Matter Mysteries
A new substance is formed when a __________ change occurs.
Chemical
How much of the earth is covered by water?
71%
How long does it take the earth to complete 1 rotation on its axis?
Accepted answers:
1 day
24 hours
23 hours 56 minutes
Fill in the blank to make the statement true.
During photosynthesis, plants make their own food.
They take in sunlight, __________, and water.
They make sugar (glucose) and oxygen, but breathe out the oxygen through their stomata.
carbon dioxide
Which vocabulary word means "A push or a pull"?
Force
True or false?
You combine 5 grams of flour, 2 grams of corn starch, and 7 grams of water to form a dough. The mass of the substances before they are combined will be the same as the mass of the dough after they are combined.
True.
Mass remains the same before and after a chemical reaction. The ingredients may look different, but the mass remains the same.
What percentage of Earth's water is salt water / ocean water?
97%
Fill in the blank to make the statement true.
We see different constellations during different _________ since the earth is facing different parts of outer space as it revolves around the sun.
seasons
In food chains and food webs, what vocabulary word is used to describe plants, because they make their own food?
Producers
True or false?
When a roller coaster has a lot of kinetic energy, its potential energy has disappeared.
False.
Energy cannot disappear. It changes from one form to another.
You have two mystery substances. Both are small white crystals. You think one is salt and one is sugar. What test could you conduct to tell them apart?
Possible answers:
-Heat them up. Sugar will melt and change color.
-Taste them.
What percentage of Earth's water is in glaciers?
2%
How long does it take the earth to revolve around the sun?
Accepted answers:
1 year
365 days
365 1/4 days
In Yellowstone, the _________ is considered a keystone species. If they are taken away, every other organism in the ecosystem is affected.
wolf
How do we see objects?
Fill in the blank to make the statement true.
__________ is reflected off objects into our eyes.
Light
List 3 signs of a chemical change.
Possible answers:
-change in odor -change in taste
-change in color -something new is formed
-produces light -temperature change
-produces heat -bubbles formed
Only 1%
As the earth revolves around the sun, the moon revolves around the earth, causing it to have 8 different ______________ throughout each month.
phases
Where does the energy in all food chains and food webs in the world come from?
The sun
In an arm wrestling match, when will you have a winner?
Use the word "force" or "forces" in your answer.
When the forces are unbalanced.
Is the following a fair test?
You want to see how two different materials react to vinegar. You pour a few drops of vinegar into a cup with the first material and stir it with a spoon. You pour 2 tablespoons of vinegar into a cup with the second material and stir it with the same spoon.
No
Name 2 sources of water pollution caused by human activity.
Possible answers:
-trash
-pesticides
-oil leaks
-fertilizer
Why does the sun appear to be bigger and brighter than other stars?
It is closer to the earth than other stars.
What do you call an organism that has to eat other organisms for energy?
a consumer
If a very fluffy white cat has kittens with a fluffy orange cat, which traits would you expect in their offspring?
a. only fluffy white kittens
b. fluffy or very fluffy white and orange kittens
c. fluffy or very fluffy black kittens
B