WorksheetsRevision 8
Total questions: 22
Worksheet time: 11mins
Enzymes act as (a) because they speed up chemical reactions in cells.
(a) is an essential macronutrient important for making new cells to help us grow and repair our bodies.
Digestion mainly takes place in (a)
(a) is the net movement of particles from a region of a higher concentration to a region of lower concentration, without the help of outside.
Hydrocarbons are molecules mainly consisting of .............................. and .............................
(a)
Combustion reactions are (a) reactions.
................................ .................................. causes carbon monoxide gases to react with more oxygen to form carbon dioxide.
(a)
The increase in greenhouse effect is known as ............................ ........................
(a)
(a) is the change of state directly from a solid to a gas.
Pressure (a) as the temperature increases.
Drag is caused due to (a)
Sound is a (a) wave.
According to the law of reflection, i is the angle of incidence and r is the angle of reflection.
i < r
i > r
i = r
none of the above
When light passes at an angle to the normal from one medium into another in which its speed is lower
it is bent towards the normal.
it always lies along the normal.
it is unaffected.
it is bent away from the normal.
In the illustration, the light ray striking the object is-
Which of the following organs absorbs almost all of the nutrients you get from the food going into your bloodstream?
Intestines
Small Intestine
Stomach
Large Intestine
when magnesium ribbon burnt it produce
magnesium hydroxide
Magnesium oxide
magnesium chloride
magnesium sulphate
Water cannot be used as a fire extinguisher to put out.
(a) Burning charcoal
(b) Burning oil
(c) Burning paper
(d) Burning cloth
Global warming is the term used to describe the RISING of the average temperature on Earth.
True
False
The Greenhouse Effect happens when the HEAT cannot escape the Earth.
True
False
Deforestation is another cause of global warming.
True
False
