Terms Flashcards Preview

KS3 sciences > Terms > Flashcards

Flashcards in Terms Deck (32)
Loading flashcards...
1
Q

examples of acids

A

citric acid, nitric acid, hydrochloric acid, sulfuric acid

2
Q

examples of acids in everyday life

A

lemons, vinegar, urine

3
Q

examples of bases in everyday life

A

soap, toothpaste, bleach,

4
Q

what type of ions do acids contain?

A

H+

5
Q

What does a plant cell have that animal cells don’t? (3 things)

A

vacuole, cell wall, chloroplasts

6
Q

function of cell wall

A

to keep a rigid structure and support the cell

7
Q

function of cell membrane

A

controls what moves in and out of the cell

8
Q

function of cytoplasm

A

jelly-like substance where most chemical reactions happen

9
Q

function of nucleus

A

where genetic information is kept and controls what happens in the cell

10
Q

function of mitochondria

A

where respiration takes place, and energy is released

11
Q

function of chloroplasts

A

contains a green pigment (chlorophyll), and is where photosynthesis takes place)

12
Q

function of vacuole

A

contains a liquid cell sap which keeps the cell firm

13
Q

tissue

A

group of cells working together to perform a task

14
Q

organ

A

group of tissues working together to perform a task

15
Q

organ system

A

group of organs working together to perform a task

16
Q

organism

A

group of cells working together to perform a task

17
Q

when exhaling, the thorax volume…

A

decreases

18
Q

when inhaling, the thorax volume…

A

increases

19
Q

when exhaling, the thorax pressure…

A

increases

20
Q

when inhaling, the thorax pressure…

A

decreases

21
Q

goitre is caused by…

A

iodine deficiency

22
Q

scurvy is caused by..

A

lack of vitamin c

23
Q

rickets is caused by…

A

lack of vitamin d

24
Q

anemia is cause by…

A

lack of iron

25
Q

similarities between solids, liquids and gases

A
  • solids and liquids have fixed volumes and cannot be compressed.
  • liquids and gases aren’t rigid and have no fixed shape.
26
Q

properties of metals

A

high melting and boiling points, good conductors of heat and electricity, high density, malleable, ductile, shiny

27
Q

properties of non-metals

A

low melting and boiling points, poor conductors of heat and electricity, not malleable, not ductile, dull

28
Q

hooke’s law

A

The extension of a spring is directly proportional to the force applied

29
Q

how was the solar system formed?

A
  • 4.6 billion years ago a nebula collapsed under its own gravity.
  • As it did, it became denser and began to spin more rapidly.
  • This led to nuclear fusion between the debris which formed planets.
30
Q

what are seasons and why do we experience them?

A

The Earth’s axis is tilted 23.4 degrees from vertical, meaning that as it orbits the sun, the northern hemisphere is either tilted towards the sun (summer) or away from the sun (winter). Wen it is summer in the northern hemisphere, it is winter in the southern hemisphere.

31
Q

repeatability

A

the same person using the same method

32
Q

reproducibility

A

a different person using a different method