A cup of water at 40 ⁰C and a cup of water at 5 ⁰C are left on a table. Which graph correctly shows the temperature of the two cups of water as time passes?

When a steel block at 100 ⁰C is placed on top of a copper block at 20 ⁰C, the thermal energy of the copper begins to increase. Which of the following is the source of this increase in energy?

The drawing on this picture shows a kernel of corn that is heated to make popcorn. Which of the following best explains what happens to the drop of liquid water inside the kernel of corn during this process?

Four containers of water with different temperatures are placed on a table as shown. The temperature of the room is 25 ⁰C.

After four hours, which beaker of water will have exchanged the most heat energy with the environment?

A teacher put one test tube of 50 ⁰C liquid and one test tube of 10 ⁰C liquid into a 20 ⁰C water bath.

Which of the diagrams best represent the direction that heat will move when the test tube are placed into the water bath?

Which of the following is the best example of heat transfer by convection?

What method of heat transfer allows the Sun's heat energy to reach Earth through the vacuum of space?

A metal pot with hot soup in it is placed on a cool stone countertop, as shown in the diagram.

The numbered arrows show the transfer of heat from the pot of soup to the surrounding environment. Which list identifies each method of heat transfer?

A diagram of the electromagnetic spectrum is shown on this picture.

Sunscreen is a lotion used to protect skin from exposure to the Sun. This sunscreen protects a person's skin from wavelength that are.

Where does visible light fall on the electromagnetic spectrum?

Which of the following explains why an apple looks red?

Which diagram correctly orders different colors of light according to the value of a property?

Which picture shows how a mirror reflects light?

Use this picture of an atom to answer the question.

Which statement best describes the part of the atom that is shown by the arrow?

Which of the following subatomic particles can be found inside the nucleus of an atom?

Which distinguishes an atom of one element from an atom of a different element?

How many protons are in an atom of bromine (Br)?

Which best describes the current atomic theory?

Which of the following represents a chemical reaction?

The law of conservation of mass can be demonstrated by a chemical reaction. Which of the following models of a chemical reaction best represents the law of conservation of mass?

In the chemical reaction shown below, all of the HCl and Zn will react to form H₂ and ZnCl₂.

Reaction: 2HCl + Zn --> H₂ + ZnCl₂

Which of the following statements describes the results of this reaction?

Jessi is copletting an investigation. She could conclude a chemical change is taking place if which of the following occurs?

Which of the following describes a chemicals change?

Which model demonstrates the Law of Conservation of Matter?

Which of these is an example of a physical change?

Which of the these is an example of chemical energy being converted into thermal energy?

Mrs. Ryland placed a water plant in a test tube, filled the test tube with water, and then inverted the tube in a beaker half filled with water. She placed a lamp next to the beaker and turned on the light (See Figure 1). The next day the class saw that the level of water in the test tube had gone down (see Figure 2).

Ella set up an experiment to investigate one of her questions (image). She set up one test tube to look like Figure 1. She set up another test tube similar to Figure 1 but without a lamp and placed it in a dark closet. The next day, Ella check the water level in each test tube.

Which question (image) could be answered with her experiment?

What was the dependent variable in the student's experiment (previous question)?

Which statement describes a positive effect of a scientific discovery?

Students are studying the growth of the two plants shown on the picture.

They are preparing a report about these plants. Which data table should be in their report?

Which method should be used to determine the type of popcorn that produces the greatest number of popped kernels?

Study the table on the picture. Which question is most likely answered using the data in the table?

Which statement is an observation?

A prediction was made that the best conditions for earthworm growth occur when there are fewer than five earthworms per cubic meter of soil. This prediction is called a

Biologists conduct investigations to learn about living organisms.

Which method helps reduce bias during an investigation?