https://forms.gle/pGvQuyqcZqbVDpYi6
Responses
https://docs.google.com/spreadsheets/d/1o9mJHHapUIHs_BskReFtJi48QljV1bLMo9uCP1tWLHU/edit?usp=sharing
1. There is no difference in the brightness of the bulbs.
2. The more the number of bulbs arranged in parallel in a circuit, the same is the brightness of the bulb
3. The lights that light up the rooms in our houses.
To calculate electrical energy passing through a bulb, use the following ratio;-
1. For bulbs in series,
Number of Batteries ÷ Number of bulbs
2. For bulbs in parallel,
Number of Batteries
3. For batteries in parallel,
number of batteries = number of batteries present in 1 ‘row’
To find out electrical energy passing through a bulb, use the following guide;-
For bulbs in series,
Number of Batteries ÷ Number of bulbs
For bulbs in parallel,
Number of Batteries
For batteries in parallel,
Number of batteries = number of batteries present in 1 ‘row’
Pg 4 Activity 1
Common factors
1. Positive and negative terminal of battery must be connected
2. There should not be any gap(s) in the circuit
3. The metal casing and metal tip must be connected to the circuit
4. All parts of the circuit must be made of conductors of electricity
1. circuit
2. bulb/battery/wire
3. tip/casing
4. negative/positive
5. current
6. closed
Pg 5
Bulb in B lights brighter than Bulb in A
The more the batteries, the brighter the bulb.
A battery is the source of electrical energy in a circuit so the more the battery, the more the electrical energy is converted to light energy.
The bulb may fuse (filament in the bulb will break/melt)
toys (eg remote control car) and torchlight
Pg 6
A lights up the brightest and C is the least bright (dimmest)
The more the bulbs arranged in series, the less bright (dimmer) is the bulb
Similarities
1. Both use *tubes to transport substances such as water and food
2. Both transport substances around the plant/human
*Blood vessels are tubes
Differences
Plant | Human |
Transport food and water | Transport food, water, oxygen, carbon dioxide |
Made up of food and water carrying tubes | Made up of heart, blood and blood vessels |
No organ is needed to transport the substances through the tubes | Heart is the organ that pumps blood transporting the substances around the body through blood vessels |
Digestive System |
Respiratory System |
Circulatory System |
Digest (breaks down) food. Digested food is then absorbed via the
small intestine into the bloodstream to be carried to other parts of the body
(eg hands, legs, brain, etc) |
Provides oxygen to other parts of the
body for respiration (releases energy). Removes waste products of respiration such
as carbon dioxide and water from other parts of the body |
Transports blood rich in oxygen and digested
food TO other parts of the body. > Blood is transported AWAY
from the heart Transports blood poor in oxygen and
rich in carbon dioxide FROM other parts of the body. |
1.
[C]
Our breathing rate increases.
[E/R] Our body parts such as muscles in our hands and legs need more
energy. More oxygen and more digested food is needed
to be transported to these body parts to produce more energy by
respiration.
2.
[C]
Our heart rate increases.
[E/R] This cause blood to be pumped faster to carrying more
oxygen and more digested food to other parts of our body for respiration
to provide more energy. More
carbon dioxide will also be removed faster