Earth and Space
What causes day and night?
Earth Rotating
What is an ecosystem
living and nonliving things interacting
What are the three states of matter?
solid, liquid, gas
What should you do FIRST when answering a science question?
read the question carefully
A plant grew 2 cm on Monday and 3 cm on Tuesday. How much total did it grow?
5 cm
Name ONE Earth system
geosphere, hydrosphere, atmosphere, biosphere
Give one example of a living thing.
plant, animal, etc.
Is melting ice a physical or chemical change?
physical change
What does “cause and effect” mean?
one thing makes another happen
A graph shows temperatures: 60°, 65°, 70°. What is the increase from first to last?
10°
What system includes all living things
biosphere
What happens if plants disappear from an ecosystem?
animals lose food / system is affected
What is matter?
anything that has mass and takes up space
If one part of a system changes, what happens?
it affects other parts
A bar graph shows 10, 15, and 20 animals. How many animals total?
45
What happens when water evaporates
it turns into a gas
Water vapor
What is a food chain?
shows how energy moves from one organism to another
What happens when you mix two substances?
they may combine physically or chemically
or
They become a mixture
Why should you look at all answer choices?
to choose the best answer
A container has 20 liters of water. 8 liters evaporate, and then 5 liters are added.
How much water is in the container now?
17 liters
How do the hydropshere and atmosphere interact
Water evaporates into the air
cloud formation
precipitation
Why are ecosystems considered a system?
all parts are connected and depend on each other
Why is burning wood a chemical change?
it creates a new substance
Why might a scientist repeat an experiment?
to make sure results are correct
A plant grows 3 cm each day for 4 days. Then it loses 2 cm.
How tall is it now, and why might that change matter in an ecosystem?
10cm
affects food/organisms