science summative Flashcards
1
Q
molecular
A
- weak forces of attraction between molecules
- covalent
- soft, any state of matter at room temp
- odours
- low melting point
- not dissolvable
- no electrolyte
2
Q
ionic
A
- strong force of attraction between opposite ions
- ionic
- hard, solid at room temp
- no odours
- high melting point
- dissolvable
- contain electrolyte
3
Q
law of conservation of mass
A
total mass of reactants = total mass of products
4
Q
acid indicator
A
- phenolphthalein = white
- bromthymol blue = yellow
- methyl orange = red
5
Q
base indicator
A
- phenolphthalein = pink
- bromthymol blue = blue
- methyl orange = yellow
6
Q
interphase
A
- cells grow
- copies genetic materials and organelles
7
Q
prophase
A
- nuclear membrane dissolved
- DNA shortens, thickens, forms double stranded chromosomes
8
Q
metaphase
A
chromosomes line up in middle of cell
9
Q
anaphase
A
- chromosomes separate into 2 identical copies
- moves to opposite ends
10
Q
telophase
A
- chromosomes reach ends of cell and lengthen
- new nuclear membrane forms
11
Q
cytokinesis
A
cytoplasm and organelles separate
12
Q
diffusion
A
the spreading of substance by the natural movement of their particles
13
Q
law of reflection in plane mirror
A
- angle of incidence = angle of reflection
- the incident ray, reflected ray and normal ray are all in the same plane
14
Q
speculation reflection
A
reflection of light off a smooth surface
15
Q
diffuse reflection
A
reflection of light off a full or irregular surface
