lesson 1

Question 1

why is water important?

Answer 1

all living things need water in order to carry out their body processes.

Question 2

how do algae and plants make their own food?

Answer 2

the process of photosynthesis

Question 3

what else is a way that animals use water?

Answer 3

as a habitat

Question 4

what is the percentage of the amount of salt water on earth?

Answer 4

97%

Question 5

what is the percentage of the amount of freshwater on earth?

Answer 5

3%

Question 6

what is it when water fills the cracks and spaces underground soil and rock layer?

Answer 6

groundwater

Question 7

what is the water cycle?

Answer 7

The water cycle is the continuous process by which water moves from Earth’s surface to the atmosphere and back, driven by gravity and energy from the sun.

Question 8

what are the 4 main processes of the water cycle?

Answer 8

evaporation, condensation, precipitation and transpiration

Question 9

what is evaporation?

Answer 9

the process where molecules at the surface of a liquid absorb enough energy to change to a gaseous state,

Question 10

what is transpiration?

Answer 10

he process of water taken in by plants and given off through the leaves as water vapor

Question 11

what is precipitation?

Answer 11

When the water droplets become heavy, they fall back to Earth as rain, snow, hail, or sleet,

Question 12

what are four main sources of freshwater on Earth?

Answer 12

ponds, lakes, rivers, and creeks

Question 13

what is water vapor?

Answer 13

water in a gaseous form especially when below boiling temperature and spread through the atmosphere.