WorksheetsLets revise
Total questions: 27
Worksheet time: 14mins
An example of a natural light source is
the moon
a candle
the sun
a torch
Mirrors work by
Absorbing the light
Refracting the light
Reflecting the light
Letting the light through
How do we see an object?
Light reflects off the object and into our eyes.
Light travels from our eyes and reflects off the object
Light reflects off our eyes and enters the object
The object produces its own light
The property of light by which it travels in a straight line is known as
Rectilinear propagation of light
lateral inversion
Circular motion
random motion
smaller branches in lungs
pharynx
epiglottis
bronchioles
alveoli
2 tubes entering the lungs
pharynx
larynx
bronchus
bronchioles
exchange of gases
bronchus
alveoli
larynx
pharynx
________ is the tube that connects the larynx to the lungs.
alveoli
larynx
pharynx
trachea
The ___________ is the dome shaped muscle below the lungs
diaphragm
rib
alveoli
trachea
Tiny air sacs of the lungs where oxygen and carbon dioxide are exchanged are ________________.
bronchi
alveoli
larynx
pharynx
your lung is part of the _____ system...
Digestive
Respiratory
Circulatory
Skeletal
Which of the following is not true during exhalation?
Diaphragm flattens
External intercostal muscles relax
Internal intercostal muscles contract
Volume of thoracic cavity decreases
What does Balloon represent in human being?
Trachea
Lung
Rib cage
Diaphragm
carbon dioxide and water are
reactants of cell respiration
products of cell respiration
Cells do cell respiration in order to make
water
glucose
energy (ATP)
oxygen
Which cell organelle carries out cell respiration?
chloroplasts
nucleus
mitochondria
cell membrane
Anaerobic respiration
does use oxygen and makes more energy
doesn't use oxygen and makes less energy
does use oxygen and makes less energy
doesn't use oxygen and makes more energy
Yeast do which type of respiration?
anaerobic
aerobic
When do humans/animals do anaerobic respiration?
all the time because it is the best way to release energy (ATP)
only at night
only during the day
when there is less oxygen available
Identify the change shown in the picture.
Irreversible physical change
Irreversible chemical change
reversible physical change
reversible chemical change
What does the picture represent ?
physical change
chemical change
Observe the picture and choose the correct option.
Irreversible physical change
Reversible physical change
Which one is not the characteristics of a physical change ?
They are changes in the physical properties of substance.
They are often irreversible
Rearrangement of molecules take place
No new substances are formed
In physical change , the substance formed has different properties than the original substance.
True
False
When a candle burns, both physical and chemical changes occurs.
True
False
