accommodated unit 2 science test

17. The temperature at which a substance changes from a liquid to a gas is the -

A. B. Melting point C. Boiling point D. Freezing point

3. A teacher wears protective gloves to lift a metal pan filled with boiling water from a hot plate. Why are the protective gloves necessary?

A. B. The metal pan insulates thermal energy. C. The metal pan conducts thermal energy. D. The metal pan reduces thermal energy.

2. A metal spoon was left in a pot of boiling soup. The cook burned a finger by touching the spoon. Why did the finger get burned?

A. B. The metal spoon conducted electricity to the cook's hand. C. The metal spoon conducted heat to the cook's hand. D. The metal spoon was an insulator to the cook's hand.

16. At what temperature does water boil?

A. 0°C B. 100°C C. It depends on how much water is being heated.

15. A student observes ice forming on the edge of a school building. At what temperature did the water outside the school building most likely begin to change to ice?

A. 100°C B. C. 20°C D. 0°C

14. A fifth grade student places these two containers of water into a freezer. Which of these statements below is true?

A. Container A will freeze in 30 minutes, but Container B will freeze in 15 minutes. B. Both containers of water will freeze at 0°C. C. D. Container A will freeze at 0°C, but Container B will freeze at 10°C.

8. A fifth grade science class conducted an experiment on density. Below is a drawing of what they discovered. Which statement can be concluded from their results?

A. Cooking oil is more dense than honey. B. C. Honey is the least dense of all the liquids. D. Cooking oil is the least dense of all the liquids.

4. Which of these is the best conductor of electricity?

A. Glass rod B. Cotton string C. D. Copper penny

6. Use the pictures to answer question 6. What can you infer about the substances from the pictures above?

A. Pepper is soluble in water, but sugar is not. B. Sugar is soluble in water, but pepper is not. C. Sugar and pepper have the same solubility.

5. A teacher mixes a white powder into a beaker of water. The powder cannot be seen in the water. The teacher then heats the mixture until the water evaporates (goes away) and the powder can be seen again. Which property of the powder is the teacher demonstrating?

A. Solubility B. Density C. Conductivity

1. A teacher sets up an experiment using five jars like the ones shown below. The teacher keeps one jar unwrapped as the control (what stays the same). The other four jars are wrapped with four different materials. The jars are each filled with an equal amount of water that is 92°C. Students observe and record the water temperature in each jar after 10 minutes. The results are shown in the table below. Which property of the materials wrapping the jars are the students most likely investigating?

A. State of matter B. Thermal energy insulation C. D. Ability to conduct electricity

10. Objects that blow into a swimming pool or that are dropped into the pool by swimmers need to be removed. These objects include foam cups, keys, and coins. Which of the following explains a useful method for removing some of these objects?

A. The keys and coins are less dense than water, so they can be easily picked up off the bottom of the pool by divers. B. C. The foam cups are less dense than water, so they can be removed from the surface with a pool cleaning net. D. The keys and coins have the same density as water, so they can be washed away when the pool is drained.

Use the picture to answer question 18. A teacher places a container of water on a hot plate and turns it on. The teacher waits for a few minutes and places a thermometer in the container of water. Using the thermometer above, what is now occurring in the container of water?

A. The water is going through precipitation. B. The water is changing into a gas. C. The water is changing into a liquid.

9. A student reads the label on the bottle of salad dressing shown below. Why would the student shake the salad dressing well before using it?

A. Vinegar and oil have different densities. B. C. Vinegar and oil both contain water. D. Vinegar and oil are both liquids.salad

7. Swimmers find that they can float more easily in the ocean than in a freshwater lake. The most likely reason is that the -

A. density of ocean water is higher than that of lake water. B. volume of ocean water is greater than that of lake water. C. temperature of lake water is lower than that of ocean water.

11. A student was identifying mystery materials based on their physical properties. All of the materials were solids that had the same mass. The first material was more dense than water, a conductor of heat, and not attracted by a magnet. Use the properties chart below to help the student identify the first material she observed.

A. plastic B. C. glass D. wood

A cook uses the ingredients listed below to prepare a meal. Which table correctly shows the physical properties of these ingredients when placed in hot water?

Ask your teacher to read all of the answer choices please

Give one reason why an ice cube is considered 'matter'.

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