Water & Its Wonders
Why do water droplets stick together on a leaf after it rains?
A. Water has magnetic properties
B. Water molecules are attracted due to polarity
C. The leaf absorbs the water and releases it slowly
D. Gravity pushes them together
B. Water molecules are attracted due to polarity
The sidewalk cracks during winter because water freezes and expands in the cracks. This is an example of—
A. Chemical weathering
B. Physical weathering
C. Erosion
D. Deposition
B. Physical weathering
When heat is added to a block of ice, what happens to the water molecules?
A. They move slower and clump together
B. They move faster and spread apart
C. They stop moving completely
D. They lose energy
B. They move faster and spread apart
In an experiment testing how temperature affects how fast sugar dissolves, the independent variable is—
A. The amount of sugar
B. The temperature of the water
C. The time it takes to dissolve
D. The color of the sugar
B. The temperature of the water
Which tool measures mass?
Triple Beam Balance
What allows a paperclip to rest on top of water without sinking?
A. Density of metal
B. Adhesion
C. Surface tension
D. Capillary action
C. Surface tension
Iron in a rock reacts with oxygen and water, causing the rock to turn reddish-brown. What is happening?
A. Oxidation
B. Condensation
C. Deposition
D. Erosion
A. Oxidation
Why do cities near the ocean have milder temperatures than inland areas?
A. Water absorbs and releases heat slowly
B. Oceans block cold air
C. Salt in the water keeps air warm
D. Clouds form only over land
A. Water absorbs and releases heat slowly
Students test how many drops of water and soapy water can fit on a penny. What is the dependent variable?
A. Type of water
B. Number of drops
C. The penny used
D. The soap type
B. Number of drops
Which tool measures length?
Ruler or Meter Stick
3. When you see food coloring spread evenly through water, what property of water is being shown?
A. Universal solvent
B. Surface tension
C. Adhesion
D. Specific heat
A. Universal solvent
When a river carries away bits of soil and rock, which process is occurring?
A. Deposition
B. Erosion
C. Condensation
D. Precipitation
B. Erosion
When you sweat on a hot day, the liquid on your skin cools you as it evaporates. What change of state is this?
A. Freezing
B. Condensation
C. Evaporation
D. Melting
C. Evaporation
Which type of graph would best display how far water climbs up straws of different sizes in a capillary action test?
A. Line graph
B. Bar graph
C. Pie chart
D. Histogram
B. Bar graph
What is the best tool for measuring volume?
Graduated Cylinder
The flower’s petals turn blue when placed in blue-colored water. Which water property explains this?
A. Surface tension
B. Capillary action
C. Universal solvent
D. Cohesion
B. Capillary action
A tree root grows into a crack in a rock, splitting it apart. What kind of weathering is this?
A. Physical weathering
B. Chemical weathering
C. Erosion
D. Deposition
A. Physical weathering
Water takes longer to heat up and cool down than sand. What property explains this?
A. Specific heat
B. Surface tension
C. Cohesion
D. Universal solvent
A. Specific heat
A student wants to find out if salt water boils faster than fresh water. What should they keep the same for a fair test?
A. The amount of water in each pot
B. The amount of salt added
C. The size of the bubbles
D. The number of times they stir
A. The amount of water in each pot
A scientist records data on the temperature of a pond every morning for a week. Which tool would they most likely use?
A. Ruler
B. Thermometer
C. Balance scale
D. Graduated cylinder
B. Thermometer
Why does ice float on water?
A. Ice has more mass than liquid water
B. Ice is less dense than liquid water
C. Water expands when it melts
D. Ice is heavier than water
B. Ice is less dense than liquid water
Acid rain causes marble statues to wear away slowly. Which type of weathering is this?
A. Physical
B. Biological
C. Chemical
D. Abrasion
C. Chemical
What is it called when water droplets form on the outside of a cold glass?
A. Precipitation
B. Evaporation
C. Condensation
D. Elimination
C. Condensation
What is the purpose of the constant in an experiment?
To keep the experiment fair. There can only be one independent variable.