Unit 5 Matter (5th)

Sonya put cake mix into a pan of water and added a little salt. She put the pan in the oven . After a while, Sonya observed bubbles overflowing out of the pan. What kind of change is ocurring?

• physical

• chemical

• scientific

• geological

Roger filled two plastic bags with with sourdough, water, and sugar. He put one plastic bag on his coffee table in his living room. He put the other plastic bag on a sunny windowsill. Which reasoning explains why Roger observed that the plastic bag by the window grew larger in size?

• The windowsill area is cooler

• The windowsill area is warmer

• The living room table area is warmer

• The living room table area is the same temperature as the windowsill

Which of the following represents a physical change?

• Cutting paper

• Fireworks

• Baking soda mixed with vinegar

• Food being digested

Which of these conditions has the greatest effect on how quickly a substance changes from one state to another?

• light

• temperature

• shape

• color

Why does orange juice have to be kept in the refrigerator?

• Orange juice tastes better when cold.

• Physical changes that cause milk to spoil are slower at lower temperatures

• The reactions that cause orange juice to spoil are slower at lower temperatures.

• No chemical or physical changes can occur at cool temperatures.

Tia tested a control solution at room temperature. She measured how fast sugar dissolved in the solution. Next, she cooled solution A and heated solution B. How quickly did the sugar dissolve in solution B compared to the control?

• Solution B dissolved faster

• Solution B dissolved slower

• Solution B did not dissolve

• Both solutions dissolved at the same rate

Four students recorded how long it took for 1 tsp of salt to dissolve in 1 cup of water. Their setups and results are shown in the table. Based on evidence in the table, which claim explains what happened when less stirs occurred?

• The speed of dissolving increased

• The speed of dissolving decreased

• The amount of salt dissolved increased

• The amount of salt dissolved decreased

Four students dissolved 30g of sugar in 100mL of water. Each student heated his or her water to a different temperature. Based on the evidence in the table, for which student did the salt dissolve the slowest?

• Marcus

• Tyra

• Luis

• Andrew

Olivia is helping her mom make sugar water for their hummingbirds. After Olivia adds the sugar to the boiling water, what will she have in the pot?

• a mixture called a solution

• a solution called a mixture

• a mixture called a combination

• a solution called a combination

Louise took her lunch outside to eat by the lake. She brought a garden salad and sweet tea. Which of these best describes the dirt, garden salad, and sweet tea?

• atoms

• solutes

• mixtures

• solutions