Quiz #3 Macromolecules, properties of H20, Data, Sci Method, etc

Why is water considered a polar molecule?

• Oxygen is more electronegative than hydrogen

• It has equal electron distribution

• It has no electrical charge

• Hydrogen atoms are larger than oxygen

In a biology experiment studying how different amounts of sunlight affect plant growth, what is the independent variable?

• The height of the plants

• The amount of sunlight given to each plant

• The type of soil used

• The temperature of the room

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Which of the following is an example of quantitative data?

• The color of a bird's feathers

• Whether a plant is healthy or unhealthy

• The 2,000 leaves growing on a tree

• The texture of an animal's fur

Tags

NGSS.HS-LS3-3

NGSS.HS-LS4-3

A scientist is testing whether different types of fertilizer affect tomato plant height. After 4 weeks, she measures each plant. What type of data is "plant height in centimeters"?

• Qualitative

• Quantitative

What is the first step in the scientific method?

• Form a hypothesis

• Make observations

• Draw conclusions

• Communicate results

What is the primary purpose of the scientific method?

• To create complex experiments

• To explore and solve problems in an organized way

• To write research papers

• To make random observations

Tags

NGSS.HS-LS1-3

NGSS.HS-PS1-3

What percentage of the human body is composed of water?

• 60-75%

• 25-40%

• 80-90%

• 40-55%

Which property allows water to rise against gravity in plant stems?

• Density

• Molecular weight

• Surface tension

• Capillary action

Why does ice float on liquid water?

• Ice is heavier than liquid water

• Ice molecules move faster

• Ice has more energy

• Ice is less dense than liquid water

What does water's high heat capacity mean?

• It heats up very quickly

• It freezes instantly

• It takes a lot of energy to change its temperature

• It always boils at the same temperature

Tags

NGSS.HS-PS3-4