Definitions
•A community of living things (plants, animals) and nonliving things (water, air) that interact in one place.
Ecosystem
At what temperature does water freeze?
32 degrees Fahrenheit 0 degrees Celcius
We use a scale: weigh it.
What causes the seasons?
The tilt of the earth
•A mixture where one substance is evenly dissolved in another (like salt in water).
Solution
The ability to do work or cause change (like sunlight helping plants grow).
Energy
When a liquid (like water) changes into a gas.
Evaporation
What is volume?
The amount of space an object takes up.
What causes day and night?
The rotation of the earth. Half is facing towards the sun (day) and half is facing away from the sun (night)
What is a physical change?
When you change a substance's form (such as cutting it) but it still remains the same substance
•Anything that has mass and takes up space (like water, air, or a rock).
Matter
When a liquid turns into a solid
Freezing
Fill in the blanks: All matter has _______ and takes ___ ______
All matter has mass and takes up space
True or False: when we see a full moon, we are only seeing half of the surface of the moon.
True.
What is a chemical change?
When a substance undergoes a change and it becomes a new substance entirely.
A push or pull that can change how something moves.
Force
When a solid turns into a liquid
What does this statement mean? Matter cannot be destroyed
Matter can only be transformed from one form to another. It cannot simply disappear.
True
Give an example of a physical change
Cutting an apple, ripping up paper, spilling water on your shirt.
•A force that pulls objects toward each other, like things falling to the ground.
Gravity
When a gas turns into a liquid. Think about water on the outside of a glass
Condensation
What does this statement mean: Matter cannot be created?
All matter has to come from somewhere. It cannot be created from nothing.
What is an orbit?
Burning wood, baking a cake, mixing vinegar and baking soda.