25/26 Science 6A 5.1-5.3

in a chemistry experiment with iodine, which items listed will have a chemical reaction with iodine via a color change? (5.2)

• baking soda

• salt

• powdered sugar

• cornstarch

A white powder is suspected to be baking soda. What would be an expected reaction with vinegar, if it is baking soda? (5.2)

• it will turn into a solid glass-like substance

• it will bubble and foam

• it will crystallize into a sugar-like substance

• it will turn a blue-black color

Which is an example of a chemical change?

• baking a cake

• blowing air into a balloon

• breaking a pencil in half

• leaving a cup of ice water outside on a hot day

How do you know that a chemical change occurred in the experiment described? (5.2)

• the balloon inflated

• the hot water warmed the bottle

• the yeast mixed with the sugar

• the balloon stretched over the bottle

Bailee explained that when traveling to the moon, he needs to pack light because the weight of objects on the moon is the same as their weight on Earth. The mass of the objects is what changes when the gravitational pull changes. Is Bailee correct in his explanation? (5.3)

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    Bailee is incorrect. Both the mass and weight will stay the same.

• Bailee is correct. The weight of the objects stay the same but mass will change.

• Bailee is incorrect. The mass of the objects stay the same but weight will change.

• Bailee is incorrect. Both the mass and weight will change.

Two kids on a seesaw can balance perfectly while on Earth. Would they still be balanced if the seesaw was on the moon? (5.3)

• yes, they would still be balanced b/c their masses would not change.

• yes, they would still be balanced b/c their weights would not change.

• no, they would not be balanced b/c their weights would change.

• no, they would not be balanced b/c their masses would change.

Which equation describes the mass of an object in relation to its volume and density? (5.3)

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Using the table below: What is the metal if the unknown metal has a mass of 428 grams & a volume of 20cm³ ? (5.3)

• Lead

• Silver

• Chromium

• Platinum

A scientist is studying rocks found within layers of Earth. She finds a rock with a mass of 72 grams and a volume of 24 cm³.

The table shows the average densities of rocks that are commonly found in the area where the scientist found the rock. Densities are rounded to the nearest tenth.

According to the data, what type of rock did the scientist find? (5.3)

• Quartzite

• Shale

• Sandstone

• Limestone

Which item is the least dense? (5.3)

• Bolt

• 100% Maple Syrup

• Cherry Tomato

• Ping Pong Ball