Describing Matter Quiz - 8th Grade

Describing Matter Quiz - 8th Grade

by Debra Daniels

Multiple Choice

1.) A metal melts at 450 degrees C. Is this property of the metal classified as chemical or physical? Why?

• This metal melting is a physical property because all changes in form or shape are physical changes. Phase changes are physical changes.

• This metal melting is a physical property because you have to bend the metal to get it hot. When it melts, it looks different, so it’s physical.

• This metal melting is a chemical property because when it melts the metal turns into something new so it’s a chemical property.

• This metal melting is a chemical property because anytime something melts it is a change from solid to liquid to gas, so chemical

Multiple Choice

2.) Plants make a sugar compound with the formula:

$$C_6H_{12}O_6$$  

What elements make up this compound?

• The elements in that compound are Calcium, Hydroxychloroquine, and Organism

• The elements in that compound are Carbon, Hydrogen, and Oxygen

• The elements in that compound are Christina, Hannah, and Olivia

• The elements in that compound are Crystalline, Hydrazine, and Odorific.

Multiple Choice

3.) Why is it correct to say that the ocean is a heterogeneous mixture?

• It is not correct, seawater is a homogeneous solution with only salt and water dissolved in equal amounts.

• It is not correct because the ocean is a homogeneous mixture of water and nothing else

• It is correct because the ocean is a mixture of seawater and many other substances like plants and animals.

• It is correct because seawater has salt in it and you can see the salt in seawater.

Multiple Choice

4.) Look at the following chemical formulas:

$$H_2O_2$$     and $$H_2O$$  .   

 Do these formulas represent the same compound? Explain.

• Yes, they are both compounds of equal amounts of hydrogen and oxygen

• Yes, they are both compounds of the same elements

• No, they are not the same compound because the first has two oxygens and the second only has one oxygen.

• No, they are not the same compound because they have different amounts of hydrogen.

​DIRECTIONS - Use the below picture to answer questions 5-6 by highlighting ALL the answers that apply.

​To make a smore, you first need to toast your marshmallow by putting it in a fire. This will burn the marshmallow and turn the outside a bit brown or even black. Crispy on the outside, gooey on the inside. Next you need to take your graham crackers, chocolate, and marshmallow and smash them all together into a sandwich. Your crackers will probably break and your chocolate might melt a little bit.

Multiple Select

​5. Which ingredient(s) undergo a chemical change to become a smore?

Click  ALL the answers that apply

To make a smore, you first need to toast your marshmallow by putting it in a fire. This will burn the marshmallow and turn the outside a bit brown or even black. Crispy on the outside, gooey on the inside. Next you need to take your graham crackers, chocolate, and marshmallow and smash them all together into a sandwich. Your crackers will probably break and your chocolate might melt a little bit.

• Graham Cracker

• Chocolate

• Toasted Marshmallow

• Nothing undergoes a chemical change

Multiple Select

6. Which ingredient(s) undergo a physical change to become a smore?

Click  ALL the answers that apply

​

To make a smore, you first need to toast your marshmallow by putting it in a fire. This will burn the marshmallow and turn the outside a bit brown or even black. Crispy on the outside, gooey on the inside. Next you need to take your graham crackers, chocolate, and marshmallow and smash them all together into a sandwich. Your crackers will probably break and your chocolate might melt a little bit.

• Graham Cracker

• Chocolate

• Toasted Marshmallow

• Nothing undergoes a physical change

Lead in School Drinking Water

​ Drinking a single glass of lead-tainted water won't cause acute poising. The Problem is that once lead gets into the body, it doesn't want to leave. So over time, small exposures can add up. And becuase lead moves into the bones, it can stay there for years-- to later enter the bloodstream and flow though out the body -- again and again. The Enviornmental Protection Agency (EPA) says that the amound of lead in drinking water should be NO MORE then 15 parts per billion.

​DIRECTIONS- Use the graph below to answer questions 7-9 in complete sentences. Explain each answer with evidence from the graph.

Poll

7a.) According to the graphs, which school had more contaminated drinking water?

Lead in School Drinking Water

​ Drinking a single glass of lead-tainted water won't cause acute poising. The Problem is that once lead gets into the body, it doesn't want to leave. So over time, small exposures can add up. And becuase lead moves into the bones, it can stay there for years-- to later enter the bloodstream and flow though out the body -- again and again. The Enviornmental Protection Agency (EPA) says that the amound of lead in drinking water should be NO MORE then 15 parts per billion.

• School A

• School B

Open Ended

7a.) According to the graphs, which school had more contaminated drinking water? Explain you answer with evidence from the graphs in complete sentences.

Lead in School Drinking Water

​ Drinking a single glass of lead-tainted water won't cause acute poising. The Problem is that once lead gets into the body, it doesn't want to leave. So over time, small exposures can add up. And becuase lead moves into the bones, it can stay there for years-- to later enter the bloodstream and flow though out the body -- again and again. The Enviornmental Protection Agency (EPA) says that the amound of lead in drinking water should be NO MORE then 15 parts per billion.

Open Ended

8. How many total classes between the two schools are safe? Explain you answer with evidence from the graphs in complete sentences.

LEAD IN SCHOOL DRINKING WATER

Drinking a single glass of lead-tainted water won’t cause acute poisoning. The problem is that once lead gets into the body, it doesn’t want to leave. So over time, small exposures can add up. And because lead moves into the bones, it can stay there for years — to later enter the bloodstream and flow throughout the body — again and again. The Environmental Protection Agency (EPA) says that the amount of lead in drinking water should be NO MORE than 15 parts per billion.

Poll

9a. Which was the most contaminated classroom?

Lead in School Drinking Water

​ Drinking a single glass of lead-tainted water won't cause acute poising. The Problem is that once lead gets into the body, it doesn't want to leave. So over time, small exposures can add up. And becuase lead moves into the bones, it can stay there for years-- to later enter the bloodstream and flow though out the body -- again and again. The Enviornmental Protection Agency (EPA) says that the amound of lead in drinking water should be NO MORE then 15 parts per billion.

• School A

• School B

Open Ended

9b. Which was the most contaminated classroom? Explain your answer with evidence from the graphs in complete sentences.

Lead in School Drinking Water

​ Drinking a single glass of lead-tainted water won't cause acute poising. The Problem is that once lead gets into the body, it doesn't want to leave. So over time, small exposures can add up. And becuase lead moves into the bones, it can stay there for years-- to later enter the bloodstream and flow though out the body -- again and again. The Enviornmental Protection Agency (EPA) says that the amound of lead in drinking water should be NO MORE then 15 parts per billion.

Poll

9c. Which was the least contaminated classroom?

Lead in School Drinking Water

​ Drinking a single glass of lead-tainted water won't cause acute poising. The Problem is that once lead gets into the body, it doesn't want to leave. So over time, small exposures can add up. And becuase lead moves into the bones, it can stay there for years-- to later enter the bloodstream and flow though out the body -- again and again. The Enviornmental Protection Agency (EPA) says that the amound of lead in drinking water should be NO MORE then 15 parts per billion.

• School A

• School B

Open Ended

9d. Which was the least contaminated classroom? Explan  your answer with evidence from the graphs in complete sentences.

Lead in School Drinking Water

​ Drinking a single glass of lead-tainted water won't cause acute poising. The Problem is that once lead gets into the body, it doesn't want to leave. So over time, small exposures can add up. And becuase lead moves into the bones, it can stay there for years-- to later enter the bloodstream and flow though out the body -- again and again. The Enviornmental Protection Agency (EPA) says that the amound of lead in drinking water should be NO MORE then 15 parts per billion.