Random Science Stuff

Question 1

All cells have a cell membrane to protect them from the environment.

Answer 1

True

Question 2

Organisms can be single-celled or multi-celled.

Answer 2

True

Question 3

All cells have a nucleus inside them.

Answer 3

False

Question 4

As one increases the magnification to see the sample under a microscope, the field of view gets larger.

Answer 4

False

Question 5

What are the building blocks of all living things?

Answer 5

Cells

Question 6

What are characteristics/ traits of single-celled organisms?

Answer 6

growth, reproduction, metabolism, and response to stimuli

Question 7

What effects do single-celled organisms have on people and food?

Answer 7

Bacteria can spoil food, keep you healthy, and get you sick

Question 8

Where do you find single-celled organisms?

Answer 8

Inside your body, pond water, yogurt, soil

Question 9

What functions do cells carry out?

Answer 9

growth, reproduction, metabolism (use energy), and response to stimuli

Question 10

Function of digestive system

Answer 10

Breakdown food into molecules

Question 11

Connection to the circulatory system

Answer 11

The molecules get absorbed by the villi and sent throughout the body by the bloodstream.

Question 12

How do cells get food?

Answer 12

Diffusion

Question 13

Mechanical digestion

Answer 13

Breaking down food by chewing, grinding, and churning

Question 14

Chemical digestion

Answer 14

Food is broken down through acids, bile, and enzymes

Question 15

Define osmosis

Answer 15

Water molecules moving from a higher concentration to a lower concentration

Question 16

Why does the body need oxygen?

Answer 16

In cells, there is a chemical reaction involving glucose and oxygen that releases energy

Question 17

Yeast experiment

Answer 17

Yeast ate the sugar and was able to reproduce and release a gas as waste - chemical reaction

Question 18

What is yeast?

Answer 18

A single-celled fungi

Question 19

Egg white experiment

Answer 19

Pepsin + acid = breakdown of egg protein - chemical reaction

Question 20

Cracker lab

Answer 20

Enzymes in saliva breaks down starches into glucose in the mouth - chemical reaction

Question 21

Purpose of breathing

Answer 21

Bringing oxygen to cells to unlock energy

Question 22

How does oxygen move through the body?

Answer 22

Oxygen moves through the lungs and out into the bloodstream

Question 23

What happens within the circulatory, respiratory, and digestive system when we work out?

Answer 23

The heart pumps faster in order to send more oxygen and glucose to our cells for more energy!

Question 24

When does your body need more or less energy?

Answer 24

More – exercise, walking, shopping
Less – sleeping, lying on the couch

Question 25

What is an open system?

Answer 25

Interacting with the environment or surrounding ecosystem

Question 26

What is a closed system?

Answer 26

A system that does not allow anything in or out

Question 27

Some (All) living things share certain characteristics: growth, reproduction, metabolism, and response to stimuli

Answer 27

False

Question 28

All living things are made of cells: some are single cells and others are multicellular, containing trillions of cells

Answer 28

True

Question 29

In single-celled (multi celled) organisms, cells organize into tissues, organs, and systems that perform specific functions

Answer 29

False

Question 30

For the body to use food for energy and building materials, it must be broken down into molecules and transported to the heart (cells)

Answer 30

False

Question 31

In cells, there is a chemical reaction involving glucose and oxygen that releases energy

Answer 31

True

Question 32

Cells use food for building materials and energy

Answer 32

True

Question 33

Body systems provide cells with basic needs such as water, carbon dioxide, and calcium (food, oxygen, and waste removal)

Answer 33

False

Question 34

The human body is a system

Answer 34

True

Question 35

Cells carry out functions like growing, reproducing, getting (using) energy from food, and responding to stimuli. Cells are living things.

Answer 35

True

Question 36

The nervous system coordinates all other body systems

Answer 36

True

Question 37

If you took a sample of pond water, which of the following would be true when looking at living things? A.) They’re too small to see without a microscope B.) The number of them increased C.) They were floating in the water D.) They consumed smaller things floating in the water E.) A and C F.) B and D

Answer 37

F.) B and D

Question 38

Which characteristics are true for BOTH single celled and multi celled organisms? A.) Grow B.) Reproduce C.) Use energy D.) Respond to stimuli E.) All of the above

Answer 38

E.) All of the above

Question 39

Where does the food you eat end up in your body? A.) The food gets absorbed into the tissues and organs that need it B.) The biggest user of the energy from food in your body is your heart C.) The food molecule enters the blood after leaving the digestive system D.) The food molecules enter the individual cells all over your body

Answer 39

D.) The food molecules enter the individual cells all over your body

Question 40

In chemistry you learned about open and closed systems. Which of the following is a true statement about the human body? A.) The human body is a closed system because matter and energy move from one part of the body to another B.) The human body is a closed system because normally the organs, tissue and cells are all internal to the body C.) The human body is an open system because you need to take in air and food for the body to function D.) The human body is an open system because the circulatory system moves food around from one part of the body to another

Answer 40

C.) The human body is an open system because you need to take in air and food for the body to function

Question 41

Homeostasis is a characteristic of which of the following ideas? A.) Humans B.) Plants C.) Animals D.) All of the above

Answer 41

D.) All of the above