7th Science Unit 1 Test Flash Cards Flashcards


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science 7th grade
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1

All living things are made up of ____________.

Cells

2

Diffusion is a type of _______________ transport.

Passive

3

Active transport uses a cells own ____________.

Energy

4

What is the total magnification of a microscope with two lenses where one lens has a magnification of 10, and the other lens has a magnification of 40?

400 (10 x 40 = 400)

5

What is the function of a cell membrane?

To control what enters and leaves a cell.

6

What organelle is the control center (brain) of the cell?

Nucleus

7

Which organelles produce most of the energy needed by the cell?

Mitochondria

8

Which organelles produce proteins in the cell?

Ribosomes

9

What is the movement of the molecules from an area of higher concentration to an area of lower concentration?

Diffusion

10

What is the movement of water molecules through a selectively permeable membrane called?

Osmosis

11

What type of transport moves materials through a cell membrane WITHOUT using energy?

Passive Transport

12

What type of transport moves materials through a cell membrane when energy IS required?

Active Transport

13

What is the function of the cell wall?

To protect and support the cell.

14

Which organelle stores food and other materials needed by the cell?

Vacuole

15

Active transport occurs when_______ is used to move substances through a membrane.

Energy

16

The passive transport of water through a membrane is ______.

Osmosis

17

TRUE OR FALSE: A microscope is an instrument that makes small objects look smaller.

False; it makes small objects look bigger.

18

TRUE OR FALSE:

The outer boundary of the animal cell is the cell membrane?

True

19

TRUE OR FALSE

Organelles that use energy from sunlight to produce energy are called chloroplasts.

True

20

TRUE OR FALSE

In passive transport, materials move from a higher concentration to lower concentration through a cell membrane.

TRUE

21

The structure that allows materials to pass into and out of a cell is the...

Cell Membrane

22

Small grain like bodies called _______ produce proteins inside cells.

Ribosomes

23

Organelles known as _______ contain chemicals that break down food particles and old cell parts.

Lysosomes

24

Two structures found in a plant but not in animal cells are the _____________ & ___________________.

Cell Wall & Chloroplasts

25

The diffusion of______molocules is called osmosis.

Water

26

Known as the "powerhouse", it converts energy in food to energy the cell can use.

Mitochondria

27

Stores water, food, or wastes and is larger in a plant cell than in an animal cell.​

Vacuole

28

The "brain" of the cell which controls cell activities.

Nucleus

29

Found only in plant cells, it gives support and protection to the cell.

Cell Wall

30

Like a warehouse because it receives and packages proteins and other materials.​

Golgi Apparatus

31

A system of tubes found around the nucleus that transports materials.

Endoplasmic Reticulum (ER)

32

A jello-like substance that holds all the other organelles in place.

Cytoplasm

33

A grain shaped organelle that produces proteins and can be found attached to the ER.

Ribosomes

34

An organelle only found in plant cells that capture sunlight for photosynthesis.

Chloroplasts

35

The job of this organelle is to break down materials for the cell.

Lysosome

36

Found in both plant and animal cells, this organelle allows certain things to enter and leave the cell.

Cell membrane

37

Identify the observation as Quantitative, Qualitative, or Both.

The cat is 15 inches tall from the tip of his ears to the bottom of his feet.

Quantitative

38

Identify the observation as Quantitative, Qualitative, or Both.

Stoplights can be red, green, or yellow.

Qualitative

39

Identify the observation as Quantitative, Qualitative, or Both.

The temperature outside was 98 degrees.

Quantitative

40

Identify the observation as Quantitative, Qualitative, or Both.

The team had purple jerseys.

Qualitative

41

Identify the observation as Quantitative, Qualitative, or Both.

The dry purple paint was smeared 1 foot on the white paper.

Both

42

What are the three components of cell theory?

All living organisms are composed of cells.

Cells are the basic unit of structure and function in living organisms.

All cells come from pre-existing cells.