What Is Going On Inside Me

Judy took some dead grass and soaked it in water for a few days. Then she looked at it under a microscope. She saw some tiny things moving around under the microscope. How could Judy tell whether what she was looking at were living things? Circle all of the following that could be used to decide whether the things Judy saw were living.

• They were too small to see without a microscope

• The number of them increased

• They were floating in the water

• They consumed smaller thinks floating in the water

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NGSS.MS-LS1-1

Circle all the things that are true both of single celled organisms and cells that are part of a multi-celled organism.

• Grow

• Reproduce

• Use Energy

• Get their own food

• Produce Waster

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NGSS.MS-LS1-1

Which of these could be caused by a single-celled organism?

• John left a bicycle out in the rain, and it began to rust.

• Joe mixed baking soda and vinegar, and it started to bubble.

• Mikayla left the milk out overnight, and it smelled sour the next day.

• Jenny put sugar into some iced tea and stirred it until she could not see the sugar anymore.

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NGSS.MS-LS1-5

Select three different places you could find free living single-celled organisms.

• Yeast

• Yogurt

• Pond Water

• Cheek

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NGSS.MS-LS2-1

Describe how the functions of the digestive and circulatory system are connected.

• The digestive system breaks down the food into molecules that can be used by the cells. The circulatory system moves the molecules from the villi to all the cells in the body.

• The digestive system breaks down the food into molecules that can be used by the cells and the circulatory system breaks the food down further.

• The circulatory system breaks down food and the digestive system transports it to the cells from the villi.

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NGSS.MS-LS1-3

Where does diffusion happen in processing food?

• when food breaks down into smaller pieces inside your mouth

• when food molecules go into cells

• when starch molecules are broken down into sugar molecules

• when food is broken down inside the stomach

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NGSS.MS-LS1-7

Which is an example of mechanical digestion?

• Teeth chewing and breaking food into smaller pieces.

• The cracker changing from salty taste to sugary taste.

• The egg breaking down in the "stomach" environment

• The yeast and sugar giving off gas.

What is the connection between oxygen and food?

• Oxygen is used in the chemical reaction that releases energy from food.

• Oxygen is needed for survival just like food is.

• Oxygen dissolves in the blood to help it to carry food molecules around the body.

• Oxygen is not used to help break food down into smaller particles.

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NGSS.MS-LS1-2

Describe two pieces of evidence that support the claim that processing food is a chemical reaction.

• In class, the yeast in the sugar water gave off gas. That was evidence of a chemical reaction when the yeast was using the sugar for food.

• The change in the taste of the cracker from salty to sweet was evidence of a chemical reaction.

• The teeth physically break the food into smaller pieces

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NGSS.MS-PS1-2

Whitney went out for a run. After 20 minutes of running, she was hot and sweaty. What is the best biological explanation for this?

• She was running harder than she usually does, so she worked up a sweat.

• Her body needed to burn food more quickly to get energy to run hard.

• Her body needed to use more heat energy to run hard.

• Her heart had to pump faster to run hard, which caused her body temperature to rise.