Scientists do many types of work. Which description characterizes one type of scientific work, an experiment?

A weather station reports that the wind is moving northeast at 12 km/hr. Which of the following best describes that measurement?

On the Moon, an object weighs about one-sixth what it weighs on Earth. How is the mass of an object different on the Moon than on Earth?

The visible part of the electromagnetic spectrum consists of the colors that we see in a rainbow. Each color that we see corresponds to a different wavelength of light. Which color of visible light has the shortest wavelength?

A motorcycle, car, van, and bus are traveling at the same speed on a highway. What do we know about the kinetic energy of the vehicles?

Penny says that dust particles in space cannot be pulled together by gravity because they have very little mass. Emma says that as long as the dust particles have any mass at all, gravity can pull them together. Who has the better argument and why?

Which of these has the longest wavelength in the electromagnetic spectrum?

Measuring speed requires the appropriate units. Which of the following is the SI unit for speed?

Dr. Suri works at a veterinary clinic and part of her job is to make sure pets are eating properly. She places a dog on the digital scale and gets a reading of 16 Newtons (N). Which of these explains this measurement?

The diagram below shows the path of motion of two balls as they are dropped. The red ball is released straight down while the yellow ball is pushed to the side as it is released. Why don't both balls have the same path of motion as they fall?

During science class, Sofie warms a beaker of water until it reaches its boiling point of 100 0 C. What will happen next to the water if she continues to warm it?

Ignacio uses a hammer to hit a nail into a board on the floor. How does gravity make it easier to hammer in the nail?

The space shuttle must produce a great amount of thrust in order to reach the height it needs to maintain its constant path around the Earth. What term describes the circular path that the shuttle makes around the Earth?

The motion of a pendulum is shown in the diagram below At which point(s) does the pendulum have the greatest potential energy?

Scientists use different types of tools to investigate how and why things happen. Here are some examples of these tools: - A diagram of a food chain in the Everglades - A plastic replica of the human digestive system Which word describes both of these examples?

Which of the following is an example of a contact force?

The diagram below shows the forces involved when 2 soccer players kick a ball at the same time. Based on the diagram, what will be the net force acting on the ball?

Calvin shines a light onto a surface. The diagram below is a drawing of what he observed. Which of the following best describes what happened to the light when it hit the surface?

Bryce observes that the Sun always rises in the east. He talks with others and finds that everyone has the same observation. Which statement represents a scientific explanation based on these observations?

Latisha notices that the air in her science classroom is much warmer than the air in her math classroom. Which statement describes how the air particles are different in her colder math classroom?

Esther is studying the physical and chemical properties of a solid substance. Which of the following statements that she made from her investigation describes a chemical property?

Jamal needs to find a solid substance that is shiny, malleable, and a good conductor of thermal energy. Which of the following kinds of elements have properties similar to those of the substance Jamal is looking for?

Blair and Aaron competed in a 400m running race. Blair finished in 55 seconds and Aaron finished in 58 seconds. Which of the following must be true?

Liang is warming a pot of soup on the stove. How does the motion of the particles in the soup change as the temperature of the soup increases?

Two identical space probes are orbiting Jupiter. Scientists determine that one probe has a greater gravitational force acting on it than the other. Which statement is the most likely reason for the difference?

A group of sheep are grazing in a field. Which form of energy is being transferred to the sheep from the grass as they eat?

Sunee mixes crushed ice into a glass of cold water. She measures the temperature of the ice water and finds that it is -2˚C. Then she puts the glass onto the kitchen counter. What should she expect to happen to the temperature of the ice water?

Kito puts his cold, metal spoon into a bowl of hot, mashed potatoes. Which process takes place when then spoon touches the mashed potatoes?

All matter has both physical and chemical properties. Which of these choices is a physical property?

Which of the following statements about acids is true?

Sonia tapped one end of a long wooden table. Sanjay and Marc listened at the other end of the table for the sounds. Sanjay pressed his ear to the table while Marc did not. Why was Sanjay able to hear the taps before Marc?

When Drew mixes two solutions together a reaction takes place and the solution becomes warm. Which statement describes what happened when the solutions mixed?

Raul and Bonnie are trying to classify several objects that they found during a field trip to the beach. They collected a sample of seawater, a piece of driftwood, and several smooth pebbles. What property is true of the driftwood and the pebbles but NOT the seawater?

Heather puts a straw into a glass of water and observes the image below: Which term best explains why the straw looks like it is broken?

Gordon throws a baseball into the air as shown below. Assume point A is just before he releases the ball and point C is when the ball is at its maximum height. At which point is kinetic energy converting to potential energy?

In chemical reactions, what does the principle of conservation of mass mean?

Which of the following has kinetic energy?

Some compounds are classified as acids or bases. Sodium hydroxide, a compound commonly found in drain cleaners, has a pH of about 13. Which of these phrases describes sodium hydroxide?

Leigh wants to make sure she understands the components of a good scientific investigation. She knows that it should be controlled and have a large sample size. Also, she thinks that the results should be communicated to other scientists. Which is another component that is necessary for a good investigation?

Which of these substances are both elements?

The diagram below shows Bohr's theory of the atom. He thought that electrons traveled on specific paths around a nucleus. The current theory is that electrons exist in certain cloud-like regions around a nucleus. How would a model of the current theory differ from Bohr's model?

Ryan wants to investigate how the angle of a ramp affects the speed of an object rolling down the ramp. He can conduct his investigation in a number of different ways. Which investigation should he perform?

The row and column where each element on the Periodic Table is located are useful in determining the properties of an element. Which of these statements best describes the elements manganese (Mn) and iron (Fe)?

Trini adds 10g of baking soda to 100g of vinegar. The mixture begins to bubble. When the bubbling stops, Trini finds the mass of the mixture. She determines that the mixture's mass is 105g. Why is the mixture's mass not the same as the total of the masses of the original substances?

In a system, when energy is transformed from one form to another...

When Drew mixes two solutions together a reaction takes place and the solution becomes warm. Which statement best describes what happened when the solutions mixed?

Damon plays guitar and he knows that when he plucks a single guitar string, the string will move rapidly back and forth. Which of these statements explains what happens to the kinetic energy of the moving string?

How is a solute different from a solvent in a solution?

Which represents an endothermic reaction?

Luis is trying to push a box of new soccer balls across the floor. If the box is not moving, which of the following must be true?

A friend, who knows a lot about science, reads in a science book that a piece of black paper will get warmer in sunlight than a piece of white paper. Which of these is a scientific reaction to this information?

Any atom that has 13 protons is an aluminum (Al) atom. Which statement best describes what would happen if a proton were added to an aluminum atom?

Troy listed below the density at 20 0 C of four metals that he is using in an experiment. If Troy has a 4cm cube of each of these metals, which cube will have the greatest mass?

Three different lab groups perform experiments to determine the density of the samples of iron. They have all rounded the density to the nearest whole number. What was the mass of iron for group 3?

Gordon places a piece of solid zinc metal in a beaker containing hydrochloric acid. He notices that a gas is produced and the zinc appears to dissolve. Which process most likely took place in the beaker?

Joanie brought a magnet near a pile that she could see contained both iron fillings and sulfur powder. The iron fillings were attracted to the magnet while the sulfur powder remained on the table. Which of these statements best describes the original pile?