Earth and Space Science Quizzes for Second Graders

Question 1

Which part of the Earth is the hottest and made of iron and nickel?

Accepted Answer

Core

Answer

Crust

Answer

Mantle

Question 2

What is a large group of stars, gas, and dust that are held together by gravity called?

Accepted Answer

Galaxy

Answer

Planet

Answer

Star

Question 3

Apart from our Milky Way galaxy, which other galaxy can we see from Earth without using a telescope?

Accepted Answer

Andromeda Galaxy

Answer

Orion Galaxy

Answer

Solar Galaxy

Answer

Mars Galaxy

Question 4

Which type of planet in our solar system is famous for its beautiful rings?

Accepted Answer

Gas Giant

Answer

Rocky Planet

Answer

Dwarf Planet

Question 5

Which of these is no longer considered a planet in our solar system?

Accepted Answer

Pluto

Answer

Mars

Answer

Jupiter

Question 6

Why do different cities around the world experience different times of day at the same moment?

Accepted Answer

The Earth spins like a top, making different parts of it face the sun at different times.

Answer

The Earth is flat, so the sun shines on all parts of it at once.

Answer

The sun moves around the Earth, making different parts of it experience different times of day.

Answer

The Earth's atmosphere bends the sunlight, making different parts of it experience different times of day.

Question 7

Which planet takes the most time to travel around the Sun?

Accepted Answer

Neptune

Answer

Mars

Answer

Jupiter

Answer

Earth

Question 8

What is a constellation? Can you name one that you can see in the night sky?

Accepted Answer

A constellation is a group of stars that make a shape or pattern in the sky, like the Big Dipper.

Answer

A constellation is a bright star that shines more than others.

Answer

A constellation is a planet that goes around a star.

Question 9

Why do things fall down when you let go of them?

Accepted Answer

The Earth's gravity

Answer

The Earth's magnetic force

Answer

The wind

Answer

The weight of the objects

Question 10

Why do we have different seasons, like summer and winter, on Earth?

Accepted Answer

Because the Earth's path around the Sun is like an oval.

Answer

Because the Earth spins like a top.

Answer

Because the Sun's strength changes.

Answer

Because the Moon pulls on the Earth's water.

Question 11

The universe is vast, but scientists have found the biggest thing in it. What is it?

Accepted Answer

A supermassive black hole

Answer

A planet

Answer

A star

Answer

A galaxy

Question 12

Have you ever seen something fall back to the ground after you let it go?

Accepted Answer

Yes, like a ball I bounced

Answer

No, things float in the air

Answer

No, things go up when I let them go

Question 13

What is a result of Earth spinning on its axis?

Accepted Answer

Day and night

Answer

Seasons

Answer

Wind

Answer

Earthquakes

Question 14

Which planet in our solar system is known as the 'Red Planet' due to its reddish appearance?

Accepted Answer

Mars

Answer

Earth

Answer

Jupiter

Question 15

Scientists believe the universe is like a giant balloon that keeps getting bigger. What force causes the universe to expand?

Accepted Answer

A mysterious force called 'dark energy' pushes everything apart.

Answer

Planets in our solar system move away from each other.

Answer

New stars being born push everything else apart.

Question 16

Stars, giant balls of hot, glowing gas that produce their own light and heat, have fascinating life cycles. What happens to stars when they run out of fuel?

Accepted Answer

They turn into black holes.

Answer

They become planets.

Answer

They become moons.

Answer

They vanish into thin air.

Question 17

Why do astronauts seem to float in space?

Accepted Answer

Astronauts are in a state called 'zero gravity'.

Answer

There is no gravity in space.

Answer

Astronauts wear special suits that help them float.

Question 18

What are the three main layers of the Earth, starting from the outermost layer?

Accepted Answer

Crust, mantle, core

Answer

Lithosphere, hydrosphere, atmosphere

Answer

Inner core, outer core, mantle

Question 19

Why do scientists use telescopes when exploring space?

Accepted Answer

To see objects that are far away

Answer

To make objects look bigger

Answer

To change the color of objects

Question 20

We breathe the air around us. Which gas do we breathe in the most?

Accepted Answer

Oxygen

Answer

Carbon dioxide

Answer

Nitrogen

Question 21

Why is the Earth's atmosphere important for life on our planet? What are some possible effects of climate change?

Accepted Answer

The atmosphere provides oxygen for us to breathe and shields us from the sun's harmful rays.

Accepted Answer

The atmosphere helps keep the Earth warm enough for life and controls the weather.

Answer

The atmosphere has no impact on life on Earth.

Answer

Climate change is not a real phenomenon.

Question 22

What is a small, rocky object that orbits the Sun and is located between Mars and Jupiter?

Accepted Answer

Asteroid

Answer

Comet with a tail

Answer

Planet with moons

Answer

Star that shines

Question 23

In space, there's a special object that's so powerful, not even light can get away from it. What is it called?

Accepted Answer

A black hole

Answer

A super magnet

Answer

A dark cloud

Question 24

Which of these is NOT a type of rock that forms the Earth's crust?

Accepted Answer

Glass

Answer

Igneous rock

Answer

Sedimentary rock

Answer

Metamorphic rock

Question 25

Which of the following is **NOT** a part of the Earth's system?

Accepted Answer

Universe

Answer

Atmosphere

Answer

Hydrosphere

Answer

Geosphere

Question 26

What is the name of the bright star at the center of our solar system that provides us with light and warmth?

Accepted Answer

Sun

Answer

Moon

Answer

Mercury

Answer

Mars

Question 27

Which object in the solar system is called the 'Red Planet' because of its reddish color?

Accepted Answer

Mars

Answer

Mercury

Answer

Venus

Answer

Jupiter

Question 28

What is the process by which rocks slowly break down into smaller pieces and form soil?

Accepted Answer

Weathering

Answer

Erosion

Answer

Volcanic eruption

Answer

Earthquake

Question 29

Which type of cloud often brings rain and can look like a big fluffy white cotton ball?

Accepted Answer

Cumulonimbus

Answer

Cirrus

Answer

Stratus

Answer

Altocumulus

Question 30

What is the name of the imaginary line around the middle of the Earth that divides it into the northern and southern halves?

Accepted Answer

Equator

Answer

Tropic of Cancer

Answer

Prime Meridian

Answer

Tropic of Capricorn

Question 31

What is the name of the huge collection of stars, gas, and dust that contains our solar system?

Accepted Answer

Milky Way

Answer

Andromeda

Answer

Carina

Answer

Sagittarius

Question 32

What are the three main layers of the Earth?

Accepted Answer

Crust, Mantle, and Core

Answer

Atmosphere, Hydrosphere, and Geosphere

Answer

Land, Water, and Air

Answer

Ocean, Sky, and Ground

Question 33

Which planet is closest to the Sun?

Accepted Answer

Mercury

Answer

Venus

Answer

Earth

Answer

Mars

Question 34

What is the name of the force that pulls objects toward each other?

Accepted Answer

Gravity

Answer

Friction

Answer

Magnetism

Answer

Electricity

Question 35

What is the name of the biggest star in our solar system?

Accepted Answer

Sun

Answer

Moon

Answer

Star

Answer

Cloud

Question 36

Which layer of the Earth's atmosphere do we live in?

Accepted Answer

Troposphere

Answer

Stratosphere

Answer

Mesosphere

Answer

Thermosphere

Question 37

What is the process called when rocks slowly break down over time?

Accepted Answer

Weathering

Answer

Erosion

Answer

Deposition

Answer

Sedimentation

Question 38

What is the name of the imaginary line that separates the Earth into two halves?

Accepted Answer

Equator

Answer

Prime Meridian

Answer

Tropic of Cancer

Answer

Tropic of Capricorn

Question 39

Which ocean covers the most area on Earth?

Accepted Answer

Pacific Ocean

Answer

Atlantic Ocean

Answer

Indian Ocean

Answer

Arctic Ocean

Question 40

Which of these is NOT a layer of the Earth?

Accepted Answer

Atmosphere

Answer

Crust

Answer

Mantle

Answer

Core

Question 41

What is the name of the star that is at the center of our solar system?

Accepted Answer

Sun

Answer

Moon

Answer

Mars

Answer

Venus

Question 42

Which planet is known for its red color and is often called the 'Red Planet'?

Accepted Answer

Mars

Answer

Earth

Answer

Jupiter

Answer

Saturn

Question 43

What is the invisible force that pulls objects towards the Earth?

Accepted Answer

Gravity

Answer

Friction

Answer

Magnetism

Answer

Wind

Question 44

Which one of these planets is the biggest in our solar system?

Accepted Answer

Jupiter

Answer

Earth

Answer

Mars

Answer

Mercury

Question 45

Which is the name of the closest star to Earth?

Accepted Answer

Sun

Answer

Moon

Answer

Mars

Answer

Venus

Question 46

What causes Earth to experience different seasons throughout the year?

Accepted Answer

Earth's tilt

Answer

Moon's orbit

Answer

Sun's rotation

Answer

Wind

Question 47

What is the name of the huge group of stars, gas, and dust that contains our solar system?

Accepted Answer

Milky Way

Answer

Andromeda

Answer

Orion

Answer

Sagittarius

Question 48

Which of these is the smallest planet in our solar system?

Accepted Answer

Mercury

Answer

Earth

Answer

Jupiter

Answer

Mars

Question 49

What is the name of the small, icy world that was once thought to be the ninth planet but is now called a dwarf planet?

Accepted Answer

Pluto

Answer

Ceres

Answer

Eris

Answer

Xena

Question 50

Why do we have different time zones around the world?

Accepted Answer

Because the Earth spins, making different parts of the planet face the sun at different times.

Answer

Because scientists created time zones to help people keep track of time.

Answer

Because the Earth's rotation has no effect on time zones.

Answer

Because only the Northern Hemisphere has time zones.

Question 51

How do the Earth's oceans affect the weather?

Accepted Answer

By absorbing and releasing heat

Answer

By reflecting sunlight back into space

Answer

By creating wind

Answer

By removing all the carbon dioxide from the air

Question 52

Why does the ground shake during an earthquake?

Accepted Answer

The Earth's crust moving

Answer

Buildings shaking

Answer

Strong winds

Answer

Animals running

Question 53

Which science rule states that the total amount of energy remains the same, even when it changes form?

Accepted Answer

Rule of Energy Conservation

Answer

Rule of Gravity

Answer

Rule of Inertia

Answer

Rule of Universal Gravity

Question 54

What is a common feature shared by all telescopes?

Accepted Answer

They collect light from distant objects

Answer

They can only be used at night

Answer

They can make objects appear upside down

Answer

They are always very large and heavy

Question 55

Which shape is NOT found in galaxies?

Accepted Answer

Square

Answer

Round

Answer

Flat

Answer

Spiral

Question 56

What is the name for a planet that is not part of our solar system?

Accepted Answer

Exoplanet

Answer

Home planet

Answer

Moon

Question 57

How do igneous rocks form?

Accepted Answer

When lava cools

Answer

When water freezes

Answer

When plants grow

Question 58

Which layer of the Earth's atmosphere is famous for having lots of clouds?

Accepted Answer

Troposphere

Answer

Stratosphere

Answer

Mesosphere

Question 59

What can cause the land to change shape quickly?

Accepted Answer

Earthquakes

Accepted Answer

Volcanic eruptions

Answer

Wind

Answer

Planting trees

Question 60

Why is it sunny in one part of the world and dark in another part of the world, even though it's the same time everywhere?

Accepted Answer

The Earth spins, so different parts face the sun at different times.

Answer

The sun is bigger in one part of the world.

Answer

Some parts of the world have more clouds than others.

Answer

Different parts of the world are at different heights.

Question 61

How do most igneous rocks form?

Accepted Answer

When hot, melted rock (magma) cools and hardens underground

Answer

When rocks are changed by heat and pressure deep underground

Answer

When pieces of rock are pressed and cemented together

Question 62

Astronauts are going on a long trip to Mars. What three things do you think they will need to bring to stay alive?

Accepted Answer

Food, water, and air

Answer

A spaceship, a spacesuit, and a flag

Answer

A map, a compass, and a flashlight

Answer

A microscope, a telescope, and a computer

Question 63

Which of these is NOT a planet in our solar system?

Accepted Answer

Pluto

Answer

Mercury

Answer

Earth

Answer

Venus

Question 64

Scientists say that the universe is:

Accepted Answer

Round and keeps getting bigger

Answer

Flat and square with edges

Answer

Shrinking and getting smaller