Science Review

When creating an experiment, Talen says that if you put baking soda and vinegar together that will create a gas which is a chemical change. Is he right or wrong and why?

• He is wrong. It is a physical change.
• He is wrong. It makes no changes.
• He is right. It will form bubbles, showing its a chemical change. 
• He is right. It is a chemical change because nothing will happen when mixed together. 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When creating an experiment, Talen says that if you put baking soda and vinegar together that will create a gas which is a chemical change. Is he right or wrong and why?

• He is wrong. It is a physical change.
• He is wrong. It makes no changes.
• He is right. It will form bubbles, showing its a chemical change. 
• He is right. It is a chemical change because nothing will happen when mixed together. 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Joel finds an animal in a small pond in his backyard. He sees that it laid its eggs, but the parents live on land. What type of animal could this be classified as?

• fish
• mammal
• reptile
• amphibian

 Jack says that if you light a match on fire, it is a physical change because it looks different which would be a physical change. Ellen says that it is a chemical change because a new substance is formed and the match cannot be reversed. Who is correct?

• Jack is correct because a physical change is when it changes color.
• Jack is correct because it is still a match.
• Ellen is correct because the match is still a match even after burning it.
• Ellen is correct because it changes temperature and cannot be reversed.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Two students mix together salt, sand and water. Which of these actions would be a physical change to the mixture?

• Boiling the water to leave the sand and salt.
• Straining the water through a strainer to leave the sand behind. 
• Cook the mixture until all the water evaporates. 
• Put more chemicals in it to allow the salt and water to evaporate. 

How can harmful microorganisms such as chicken pox be used tor beneficial purposes?

• Harmful microorganisms help the bacteria in your body stay balanced.
• Harmful microorganisms can be used to make yogurt.
• Scientists can take small amounts of the virus and use it to make a vaccine.
• Harmful microorganisms have no beneficial uses.

Microorganisms have many different purposes.  What is one beneficial use of yeast?

• to fight off bad microorganisms
• to make yogurt
• to cure chicken pox
• to make bread rise

Abraham leaves a peach on the counter as part of an experiment.  After four weeks he notices that a bluish green mold is on the peach.  Which conclusion is true about this experiment?

• Microorganisms grew bigger and bigger as they ate the peach.
• The mold is not a microorganism.
• Microorganisms on the peach multiplied many times making them visible without a microscope.
• Peaches naturally turn bluish green as they ripen.

Tags

NGSS.MS-LS1-5

• The puppies will have thick fur.
• The puppies will easily respond to a whistle. 
• They will not have a long tail. 
• The puppies will herd sheep easily with training. 

Tags

NGSS.MS-LS4-4

What would happen to the plant cell without the chloroplasts?

• There wouldn't be an organelle that performs photosynthesis
• There wouldn't be an organelle that serves as the resevoir for water and waste
• There wouldn't be an organelle that regulates what comes in and out of the cell
• They wouldn't be an organelle that makes necesary proteins

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-6