What is an insulator of thermal energy?

Which materials are usually good conductors of electrical energy?

Your class is participating in a "Tiny Robot Rescue" challenge as part of your electrical safety unit. The challenge involves retrieving small robot parts that have fallen near a live electrical outlet in a mockup of a futuristic laboratory. Your team must choose the safest tool to recover these delicate components without risking electrical shock.

Pedro notices that his grandmother uses different spoons when cooking. Some have wooden handles and others have metal ones. Why might wooden handles be better to use when cooking?

Arturo is trying to create a container to keep food cold for a long time so it does not go bad. He has tried different materials. Which material would be best for him to use to build his container?

The diagram shows an electrical plug with a cord that has been cut. Use the diagram to answer the question. Which parts of the electrical plug will insulate against heat loss and will not conduct electricity well? Choose TWO.

A salad is a good example of a mixture because the ingredients are mixed but do not change and can be separated.

Calculate the mass of the peas and carrot salad.

Select the best tool you would use to separate a mixture of water and sand.

Select the best tool you would use to separate iron filings from sand.

Select the best tool to separate gravel from sand.

Armando wants to make his own trail mix. He mixes 680g of peanuts, 340g or raisins and 415g of pretzels. What is the total mass of the trail mix?

A mixture combines two or more substances that do not form a new substance. Which of the following is an example of a mixture?

A recycling center needs to separate a mixture of aluminum cans from steel cans. Which tool would be the most effective for separating the mixture of cans?

We are separating a solution of 30g of salt and 100 mL of water. The combined mass of the solution is 130 g. After we apply heat, the solution separates into salt and water again. What is the mass of the salt and water after separating? Select TWO.

Ursula is investigating the property that some substances have of dissolving in water. What is this property called?

When testing solubility of different materials, Betty discovered that sugar completely dissolves in water but flour does not. Why is that?

Which of the following is an example of a solution?

Students learn that the volume of an object depends on the

amount of space the object takes up. Based on this

information, which of the following objects has the least

volume?

A student is creating a collection of objects that are magnetic. Which items do not belong in his collection? Select TWO.

A student uses a triple beam balance to measure the mass of an ice cube. The student records the mass of the ice cube as 7 grams. The student then allows the ice cube to melt and measures the mass of the melted ice cube. What was the mass of the water after it melted?

A class compares changes in the states of matter of a substance. They made observations and created the diagram. Which of the following caused the change in matter in the substance the class observed?

Students are learning about the physical property of density in class. A student wonders what will happen when an object that has a density greater than water is dropped in a container filled with water. Which choice explains what will happen to the object?

A student observed liquid wax dripping down the side of a burning candle. After putting out the candle’s flame, the student left the room. Several hours later the student observed that there was no longer any liquid on the side of the candle. Which statement explains what most likely happened to the liquid wax?

Look at the picture. What is total mass of the solution?

Sarah makes a salt solution and lets it evaporate completely. She finds that the mass of salt left behind is the same as the mass she originally added. What law of nature does this demonstrate?