Unit 1
What is matter made of that is too small to be seen?
Tiny particles.
What happens to the total weight of matter when it is heated or cooled?
It stays the same.
What are the four main Earth systems?
Geosphere, hydrosphere, atmosphere, biosphere
What force pulls objects toward Earth?
Gravity
Definition for Matter?
Anything that has weight and takes up space.
Where does the energy in animals’ food originally come from?
The Sun
What tool would you use to measure the mass of an object?
A balance or scale.
Which type of water is most common on Earth: freshwater or saltwater?
Saltwater
Why does the Sun appear brighter than other stars?
Because it is much closer to Earth.
Definition of Mixture?
When something is made of more than one material.
What two main things do plants need from their environment to grow?
Air and water
One of the properties to identify a substance is color. True or false
True
Where is most of Earth’s freshwater found?
In glaciers and ice caps
What causes day and night on Earth?
Earth’s rotation
Definition of Orbit?
The path one object takes around another in space
What is the role of decomposers?
They break down dead organisms and recycle nutrients.
What is the difference between a chemical change and a physical change
A chemical change cannot be separated, a physical change can be separated.
What is one way humans affect the ocean? (come back to this one)
Plastic in the oceans, using AI,
When would a shadow be shorter at 8A.M or at 12pm
Definition of Biosphere?
All living organisms on Earth.
How does energy move from the Sun to animals?
Energy moves from the Sun → plants → animals.
Name one way a chemical change can occur.
Color change, gas produced, temperature change, or new substance forms.
What is one way communities can help protect the environment?
Reduce waste, recycle, conserve water, protect habitats
Why do some stars only appear during certain times of the year?
Because Earth orbits the Sun, changing our view of space.
Definition for Earth's Rotation?
The spinning of Earth on its axis, causing day and night.