Water Facts
Only 3 percent of Earth's water is ________ water.
Fresh Water
Water is pulled down by _________.
Water is pulled down by gravity.
Liters are used to measure __________.
Liters are used to measure volume.
Will water be moving faster at the top of a river or bottom of a river?
Water at bottom of river will be moving fastest Evidence: drops moved faster on trays with steep slope.
True or False:
Most of Earth's water is in the ocean.
True, 97% of Earth's water is in the ocean.
True or False:
96% of Earth's water is Salt Water.
False, 97%
__________- is a claim based on belief, not on scientific data or observations
opinion- is a claim based on belief, not on scientific data or observations
How many milliliters are in 1 liter?
1000 mL = 1 liter
What is it called when there are things that change an experiment? (Hint: snowboarding)
Variable-
The elements that change in an experiment are called variables.
Water is made up of tiny particles that are attracted to each other. At the surface where water meets the air, the attraction is very strong. What is this attraction called?
Surface Tension
Name the 3 states of water.
Water can be a solid, liquid or gas/water vapor.
____________- is data used to support a claim
evidence- is data used to support a claim
Why do we compare measurements such as:
A bath uses about 114L
A shower uses about 19 -38 L per minute
A dripping faucet can waist more than 3,800 L each year
It's important to know how much water we are using because it costs money. We also need to conserve water because all living things need it to survive.
Some children got into a car one morning. The temperature outside was 0°C. The car windows were clear and dry. Soon the car windows got “fogged up” on the inside of the car. What caused the water to appear on the inside of the windows? (Mark the one best answer.)
❍ A The glass and the humid air from breathing were both cold.
❍ B The glass was colder than the humid air from breathing.
❍ C The glass was warmer than the humid air from breathing.
❍ D The glass and the humid air from breathing were the same temperature.
B. The glass was colder than the humid air from breathing.
What unit would be used to measure mass?
Mass is measured using grams.
Name 3 sources of freshwater.
Lakes, rivers and groundwater
Define absorbtion.
Absorbtion- when water soaks into a surface
Why do scientists do an experiment more than once?
So that they can compare results just in case they didn't do it correctly or there are variables.
True or False?
Lakes are a source of salt water.
False, Lakes are a source of fresh water.
Explain an example of how surface tension works. (Hint: It's something we did in class)
Fill a glass to the top with water. Keep adding more water a little at a time. The water will form a dome at the top of the glass but won't spill out. The skinlike surface tension pulls all around the outside of the water.
What is it called when there is a water shortage?
A water shortage is called a drought.
What are "natural materials"?
natural materials- material, such as soil or water, that comes from the natural environment
What is instrument is used to measure volume?
A graduated cylinder & other types of measuring cups.
If the mass of the dry sponge is 5 grams and the mass of the wet sponge is 55 grams, how many times the mass of the sponge is the mass of the water?
The mass of the water is 50 grams because 55-5 = 50 grams.
The mass of the water is 10 times greater
On Monday, it rained all night. It was not raining on Tuesday morning. On Tuesday afternoon, a class of students went for a walk. They walked on four different surfaces:
• Across the middle of the grass soccer field
• Along the concrete sidewalk from the parking lot to the school
• Across the sand-covered playground under some big trees
• Along the packed-dirt path in the woods in a sunny clearing
Explain what might affect whether there were puddles on the surfaces of the areas where they walked.
- Puddles depend on how absorbent the ground material is; some things absorb more water than others.
-Rate of evaporation varies depending on temperature (sun or shade), and how much the air is moving in that location.