Energy Flow
What is the main source of energy in a food web?
The Sun
What is the second largest source of freshwater on Earth?
Groundwater
What force pulls meteors to Earth?
Gravity
Does mass change when matter melts?
No
What happens to cups when air pushes them off a table?
Gravity pulls them down
What do plants provide to animals that eat them?
Energy
What type of water is found in all bays?
Salt water
Why does the Sun look brighter than other stars?
It is closer
What property allows iron to be attracted to magnets?
Magnetism
What uses the least water: bath or brushing your teeth with water off?
Brushing with water off
What happens to nutrients when an organism decomposes?
They return to the soil
Beach erosion is an interaction between which two systems?
Geosphere and hydrosphere
When are shadows longest: noon or dawn and dusk?
Dawn and dusk
Why doesn’t pepper dissolve in water?
It is insoluble
What spheres are interacting when a bear hibernates in a cave?
Biosphere and geosphere
What gas do animals release that helps plants make food?
Carbon dioxide
Why is more electricity used in winter with solar panels?
Fewer daylight hours
Why do two shadows at different times of day look the same length?
They occur at dawn and dusk
What may happen when mixing an unknown powder with water?
A new substance could form
Does soil mass change a lot as plants grow in a pot?
No
Where do epiphytes get water and nutrients?
From the air
Why were canaries used in mines?
To detect toxic gases
What happens when a meteor gets too close to Earth’s orbit?
It is pulled to Earth
What happens when salt water evaporates on a stick?
Salt is left behind
How can you detect a skunk without seeing it?
By smell carried in air