Test

Zara is baking with toppings for her family. Here are the items she needs. Write the name of each item that Zara needs in the correct column of the table.

• Solids: flour, butter, sugar

• Solids: rice, fish, vegetables, salt.

• Liquids: milk, beaten Eggs, Sugar

• Liquids: Water, fish sauce, Matcha Latte

Please choose the correct state of the object: butter

• Solid

• Liquid

• Gas

Please choose the correct state of the object: butane gas

• Solid

• Liquid

• Gas

Please choose the correct state of the object: air

• Solid

• Liquid

• Gas

Material A is a solid, liquid, or gas? Explain your answer.

• A is a gas. Because it can be compressed. Only gases can be compressed, solids and liquids cannot.

• A is a solid. Because it has a fixed shape and cannot be compressed.

• A is a liquid. Because it can flow and does not hold a fixed shape.

• A is a solid. Because it can be compressed just like a gas.

Arun thinks that material C is a liquid or gas. What additional test would you perform to determine what it is? Explain your choice.

• He should check if material C can be compressed. If it can, then C is a gas; if not, it is a liquid.

• He should check if material C can conduct electricity.

• He should check if material C can dissolve in water.

• He should check if material C can react with acid.

Arun thinks that material D is a liquid. Is this correct?

• Correct, because material D can flow and does not hold a fixed shape.

• Correct, because material D is a metal.

• Incorrect, because material D is a solid.

• Incorrect, because material D is a gas.

Question 5: Arun knows that material E is not a gas. Explain why he knows this.

• Material E retains its volume, so it cannot be a gas.

• Material E can evaporate at room temperature.

• Material E has a special color.

• Material E can conduct electricity well.

Question 6: What experiment should he conduct to determine whether material E is a liquid or a solid? Explain your answer.

• He should check if material E can flow. If it can flow, it is a liquid. If it cannot flow, it is a solid.

• He should measure the temperature of material E to determine its state.

• He should check if material E glows in the dark.

• He should try to dissolve material E in water to determine its state.

Flour is a solid, but it is in powder form. When Marcus was baking, he noticed that flour can be poured out of the container. Observation A shows what about the properties of flour?

• A. Flour is a liquid

• B. Flour can flow like a liquid

• C. Flour is a gas

• D. Flour is a solid in powder form