Physical Science
What is the smallest unit of matter?
Atoms and Molecules (either word is correct)
Gravity always pulls things to the _______ of earth
Center of earth
What is the formula for photosynthesis.
____ + _____ + ______ make ______ + ______
water + carbon dioxide + light make glucose + water
What direction do stars and the moon move across the sky at night? From _______ to ________
From east to west
What are the 4 spheres of earth?
Hydro - water
Atmo - Air / gasses
Geo - land
Bio - life
It is how much matter is in something. Measured in grams.
Mass
True or False - Anything that has mass has gravity. Even you.
True
Most of the mass of a plant comes from what 2 things?
water and carbon dioxide
Why do stars and the sun move across the sky?
Because earth rotates on its axis.
Put the amount of water on earth in order smallest to biggest.
aquifers (underground water) / rivers and lakes / salt water / ice
rivers and lakes / aquifers / ice / salt water (oceans)
It's how much space something takes up. Measured in milliliters / liters
Volume
What has more gravity the Earth or Jupiter.
Explain why
Jupiter has more gravity because it is bigger.
What 2 things start every food chain or food web?
light and plants
The star Betelgeuse is 900 times bigger than the sun. Why is the sun brighter?
The sun is close to earth and Betelgeuse is far away.
How can water split open a rock?
Water goes into a crack. When it freezes it expands.
100 grams of baking soda is mixed with 100 grams of vinegar.
After it stops bubbling it weighs 150 grams. How much carbon dioxide did it produce?
100 + 100 = 200 grams
200 - 150 = 50 grams
It made 50 grams of carbon dioxide
What direction do all rivers flow?
Explain why.
All rivers flow down hill because gravity pulls everything down.
What recycles matter back into every ecosystem or food web?
Decomposers
Put the phases of the moon in order from smallest to biggest.
Crescent / Gibbous / New / Full / First Quarter
New / Crescent / First quarter (half) / Gibbous / Full
Explain how one side of a mountain can be warm and the other side of the mountain be cold?
The cold air sinks and can not go over the mountain. The mountain blocks it.
How could you separate a mixture of sand and wood shavings?
Put it in water. Wood floats and sand sinks.
Explain how a trebuchet works. (The things on the shelf)
Gravity pulls the mass box down which makes the sling launch the projectile.
How do producers, consumers, and decomposers each get their energy?
Producers make their food (glucose) for energy. (plants)
Consumers eat other things for energy.
Decomposers break down dead things for energy.
What is the difference between a waxing crescent moon and a waning crescent moon?
Waxing - it is getting bigger
Waning - it is getting smaller
Explain how one side of a mountain can be wet and the other side of a mountain be dry
When the air goes over the mountain. It makes clouds and rain/snow. The air is dry when it goes to the other side. A rain shadow.