This diagram shows one type of model of the brain. Which item represents another type of brain model?

The following picture shows an object resting on a balance.

The weight of an object is given by F = mg, where g = 10 m/s2. With what force does the object push down on the balance?

Whether you live in a tropical climate, a temperate climate, or a polar climate, you share something

with the rest of the world—your climate is influenced by the latitude where you live. Which best describes why latitudes closer to the equator have warmer climates?

The following diagram shows the water cycle. The four different parts of the cycle are labeled A, B, C, and D.

Which part of the water cycle represents precipitation?

Tyrone wants to determine how fast a bowling ball travels when it is bowled. He uses a stopwatch to record, in seconds, the time it takes for the bowling ball to reach the pins. Which unit would be most appropriate to measure the length of the bowling lane?

A rocket burns fuel to create hot gases that explode violently out of the rocket engine. This explosion creates thrust. Thrust is a force that pushes the rocket upward. What force must thrust overcome in order to send a rocket up into space?

A student performed a scientific investigation using four small balls of the same size and shape and a ramp. Each ball was taken to the top of the ramp and released. After several trials, three of the balls rolled across the floor and went about the same distance each time. The striped ball only went about half the distance as the other balls. Which claim can be made based on the evidence from the experiment?

Earth would be as lifeless as the moon without the atmosphere—a blanket of gases that surrounds the planet and extends about 700 km above its surface. Refer to the following circle graph.

The graph shows the relative abundance of gases in Earth’s atmosphere. Which gas corresponds to label B in the figure?

Vinay is not feeling well. He visits his doctor. The doctor gives Vinay a prescription for antibiotics. What do you claim about the cause of Vinay’s illness?

How are photosynthesis and cellular respiration connected?

Wally is performing an energy experiment with a weight at the end of a spring. He made this drawing to show what happens when he stretches and then releases the spring. Position 1 shows the spring at the start of the experiment. Position 2 shows how it looks when Wally pulls the weight downward and stretches the spring. Position 3 shows what happens right after the spring is released. Position 4 shows the spring just before the weight starts to fall back down.

At which point does the spring have the greatest amount of elastic potential energy?

The following table lists data obtained during a laboratory experiment about the effect of an object’s mass on its free-fall acceleration due to gravity.

Based on these results, what prediction can you make about a free-fall acceleration when the object’s mass is doubled to 100 kg?

Which organ does most of the processing of nutrients in the human body?

As blood flows to the heart from the toes and fingers, it travels mainly through tissue called