Ecosystems
Space
Matter
4th Grade Science
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100

What is the word for animals that eat other animals?

Carnivores or predators

100

What is the force that pulls objects with mass toward Earth?

Gravity

100

What is the word for how much space something takes up?

Volume

100

What part of a plant moves water and nutrients up and down the plant?

The stem.

100

What is the word for an organism that breaks down waste or dead plants and animals?

Decomposer

200

Name an ecosystem that is good for plants and animals that are adapted to live in the heat.

Desert, rainforest, tropical beach

200

Why does the sun look bigger than other stars?

It is much closer!

200

What are the tiny things that everything is made of?

Particles or atoms.

200

If a ball collides with a marble, what will happen to the marble?

The marble will move forward because energy will transfer to it from the ball.

200

What is the geosphere?

The Earth, such as the rocks, soil, and landforms.

300

What three things does a plant need to go through photosynthesis?

Sunlight, water, and carbon dioxide

300

How long does it take the Earth to make one orbit?

365 days, or a year

300
What are the three states of matter?

Solid, liquid, gas

300

How do we get energy from a wind turbine?

We use the motion energy when the wind pushes the blades and make it spin.

300

What color are the hottest stars?

Blue

400

Explain an example of interdependence in an ecosystem.

Animals or plants that help each other - for example bees and flowers, birds and deer, sea anemone and clownfish...

400

What is the distance used to measure how far away stars are?

Lightyears

400

Give an example of a physical change.

A haircut, folding a paper airplane, boiling water... anything that does not create new matter.

400

What is erosion?

When a force like wind or water moves bits of rock, soil, or sand to a new place.

400

What will happen next year when you go to middle school science?

You are going to show off your science knowledge, learn a ton, and I am going to miss you :)

500

How can an invasive species affect an ecosystem?

They might harm or take over an ecosystem because they eat too much food, reproduce quickly, or have no predators.

500
How fast is Earth's rotation?

100 point bonus: Why can't we feel it move?

1,000 miles per hour
We can't feel it because it moves at a constant speed, and we can only feel changes in speed.

500

Explain why mixing vinegar and baking soda together is a chemical change.

A new substance is created - gas, and you can't change it back to vinegar and baking soda.

500

What are tectonic plates?

Pieces of the Earth's crust that slowly move over time.

500

What is a conductor?

Something electricity can travel through, such as wires.

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