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Q 1/40
Score 0
what are some factors that affect dissolving -
30
stirring, decanting, filling, circulating
stirring, temperature, time, amount of solute, amount of solvent
temperature, skimming, decanting, amount of solvent, amount of solute.
amount of solvent, circulating, padding, skimming, solute
Q 2/40
Score 0
The mark on the middle of a ship that shows how laden it is is known as a _
30
Primesol
Plysol
Primsoll
Plimsoll
40 questions
Q.
what are some factors that affect dissolving -
1
30 sec
Q.
The mark on the middle of a ship that shows how laden it is is known as a _
2
30 sec
Q.
Two things that can be produced when you mix a solid in liquid are
3
30 sec
Q.
What has taken place when two or more materials mix together to form a new material
4
30 sec
Q.
Any change that is permanent and not possible to get back the materials as they were is an __________________ change
5
30 sec
Q.
Any change that is not permanent and it is possible to get back the materials as started with is a __________________ change
6
30 sec
Q.
The process of separating insoluble substances which are heavier than liquid by allowing them to settle down on their own due to gravity is called _________
7
30 sec
Q.
The particles which settle down during sedimentation are called -
8
30 sec
Q.
The process where the clear upper liquid is poured out from theĀ container without disturbing the sediment is known as -
9
30 sec
Q.
The upper clear liquid gotten after sedimentation and before decantation is called -
10
30 sec
Q.
_______ is a process by whichĀ insoluble solidsĀ can be removed from a liquid by using aĀ filter paper.
11
30 sec
Q.
A mixture of chalk powder and water can be separated by -
12
30 sec
Q.
The process of conversion of water into vapour by heating it to its boiling point is called -
13
30 sec
Q.
The process of conversion of water vapour into its liquid form is called -
14
30 sec
Q.
salt can be easily obtained from the salty water by the process of
15
30 sec
Q.
A mixture of sand and salt can be separated by combination of methods. State them:
A solution is said to be _____________ if it cannot dissolve more of the substance in it at a particular temperature.
18
30 sec
Q.
A solution is said to be _____________ if it can dissolve more of the substance in it at a particular temperature.
19
30 sec
Q.
Fire is a chemical reaction that releases ___
20
30 sec
Q.
Fires require __________, _________, and ____________to burn
21
30 sec
Q.
A candle flame typically burns at around
22
30 sec
Q.
The fire triangle's three sides illustrate the three elements of fire: heat, fuel and oxygen.
23
30 sec
Q.
The three elements of fire must be combined in the right proportions for a fire to occur. If any of the three elements are removed, the fire is extinguished. True or False
24
30 sec
Q.
A change that can be undone or reversed and does not create a new material is known as a _______________ change.
25
30 sec
Q.
A permanent change that cannot be undone, and in which new substances are formed is known as a _____________ change
26
30 sec
Q.
Baking and cooking creates what type of change
27
30 sec
Q.
folding paper and blowing a balloon caused what kind of change
28
30 sec
Q.
Burning of wood is an ________________ change
29
30 sec
Q.
Human growth is an ________________ change
30
30 sec
Q.
Digestion is an ________________ chang
31
30 sec
Q.
Heating, Stirring and Grinding are ways we can make solutes to dissolve faster. True or false
32
30 sec
Q.
Most solids dissolve better in cold water than in warm water.
33
30 sec
Q.
The process where rain water soaks into the ground, through the soil and underlying rock layers is known as _____
34
30 sec
Q.
The process where plants absorb water from the soil, and the water moves from the roots through the stems to the leaves is known as. _____
35
30 sec
Q.
Much of the water that returns to Earth as precipitation runs off the surface of the land, and flows down hill into streams, rivers, ponds and lakes. This is known as ______________
36
30 sec
Q.
who is referred to as "father of chemistry"
37
30 sec
Q.
Chemicals that speed the breakdown of food without being changed themselves are known as ________
38
30 sec
Q.
The hole and muscular ring through which solid waste is expelled is known as ______________
39
30 sec
Q.
The heaviest organ in the body at 1.5kg, is ______________