science test on wednesday Flashcards
1
Q
why do cells divide?
A
to make more cells
2
Q
what are 3 reasons cells need to divide?
A
- To repair damaged tissue
- To create new life
- to replace old cells
3
Q
What is science.
A
4
Q
How does technology impact scientific achievement?
A
5
Q
Why would scientists want to collaborate with each other?
A
6
Q
how do you use a microscope?
A
- secure slide with the stage clips.
- Turn light on
lowest magnification = 40x middle = 100x
Highest = 400 times
4 .Remove slide - turn light off
- lower stage
- switch to lowest objective lense lowest magnification = 40x middle = 100x
Highest = 400 times - unplug wrap up cord and put cover on it.
7
Q
What is diffusion? Can you give an example of where you’ve seen it? (high to low)
A
8
Q
Can you model it? ( diffusion)
A
9
Q
What is osmosis?
A
The diffusion of water
10
Q
A
