On the image, which letter represents the objective?

• A
• B
• C
• D
• E

A microscope has a 4X ocular lens and a 10X objective. What is the total magnification?

• 4X
• 14X
• 40X
• 400X

To focus a specimen, it is best to start with which objective?

• High powered
• Low powered
• Scanning
• Ocular

A baby song bird hatches from its egg with both parent songbirds watching.

• All living things reproduce
• All living things maintain homeostasis
• All living things use energy
• All living things grow and develop

A tulip opens in the morning at sunrise and closes in the evening at sunset.

• All living things have cells
• All living things use energy
• All living things respond to their environment
• All living things grow and develop

A teacher said to the students, "Water is often considered a universal solvent". Which student's response could be used as evidence to reinforce this statement?

• "I remember that water works like magnets and has poles, causing the molecules to stick together. This helps many items to dissolve."
• "I believe that the universe has some planets that have water on them and others do not. However, Earth is the only planet that has water in all 3 phases."
• "I wonder how many gallons of water are on Earth. If we solved that problem that would take us a very long time."
• "I do think that water can be used to solve many problems in the universe. Everything needs water to live."
• "I know that there is more water on the Earth than land. Most of that water is salt water from the oceans: about 97 percent."

A teacher lists some solvents with their boiling point and freezing point temperatures, as shown. She asks her students to predict the particle motion of the solvents at different temperatures. Which prediction(s) is/are correct?

• At 78°C, water molecules slide past each other.
• At – 2°C, water molecules have large spaces between them.
• At – 25°C, carbon tetrachloride molecules vibrate at non-fixed positions.
• At 106°C, formic acid molecules move with the lowest energy.

Substance X changes from liquid to vapor at 100°C. What process happens to the substance at 100°C?

• Melting
• Freezing
• Boiling
• Condensing

A student performed an experiment to show that dark colors absorb more heat than lighter colors. The student painted five test tubes with different colors and placed them in a test tube rack. He then added equal amounts of water to each test tube and left them in the sun for six hours. At the end of this he recorded the temperature of the water in each test tube using a thermometer. The table shows the data he collected. Which statements show that the experiment was carried out using suitable controlled variables?

• Pouring an unequal amount of water in each of the test tubes
• Using sunlight for heat rather than other sources
• Using exactly five test tubes in the experiment
• Exposing all the test tubes under the sun for a fixed time

Which of the following describe the properties and behavior of water as a solid?

• Floats on liquid water
• Molecules have free space to move
• Takes the shape of its container
• Molecules most tightly packed