Gravity, Mass and Weight
Formation of the Solar System
Tides
Forms of Energy
Changes in Energy
100
What is the weight of a 35 kg dog on Earth?
350 N
100
What is the name for the large cloud of dust and gas that the solar system formed out of?
A nebula
100
TRIVIA: What is the largest Ocean in the World?
The Pacific Ocean
100
TRIVIA: Who is the most popular person from Thailand (based on number of IG followers)?
Lisa - 105M followers
100
TRIVIA: How many medals did Thailand win in the 2024 Olympics
6 medals
1 gold, 3 silver and 2 bronze
200
Draw a force diagram of an iPad sitting on a student's desk. Label the force arrows.
Weight acting downwards
Contact force acting upwards
Length of force arrows should be the same
200
TRIVIA: What is the only metal that is a liquid at room temperature?
Mercury
200
1. What is the name of the force responsible for the tides?
2. Why is this force much stronger from the Moon than the Sun?
1. Tidal force
2. The Moon is much closer to Earth than the Sun
200
What is another name for light energy?
Radiant energy
200
What does the word dissipation mean?
To spread out to the surroundings.
Wasteful energy is dissipated.
300
What is the mass of a ball that weighs 80N on Mars (g=4 N/kg)?
20 kg
300
Why do scientists use models to explain how the solar system was formed.
They were not around to observe the formation of the solar system.
300
If the low tide at Pattaya beach is at 6:30 AM, what time will the next high tide be?
12:30 PM
There is 6 hours between the low tide and high tide
300
What type of energy is stored in a battery?
Chemical energy
300
Draw an "energy transfer diagram" to show the energy conversion that take place in a motorcycle.
Chemical energy (from the fuel) is converted into kinetic energy (useful), thermal energy (wasteful) and sound energy (wasteful).
400
Draw a force diagram of a boat sinking into the Ocean. Label the force arrows.
Weight acting downwards
Upthrust force acting upwards
Length of weight arrow should be longer
400
The closer a planet is to the Sun the (stronger / weaker) the gravitaional force it experiences. This means the closer a planet is to the Sun the (faster / slower) it orbits the Sun.
1. Stronger
2. Faster
400
The average depth of water near the coast of Phuket is 4 meters.
The largest tidal range at this location is 3 meters. What is the maximum depth depth of water at this place.
5.5 meters
400
List 2 types of energy stores
Gravitational potential energy
Elastic potential energy
Chemical energy
Kinetic energy
400
A lightbulb uses 200 J of electrical energy. 80 J of thermal energy are dissipated to the surroundings. How much light energy is produced?
120 J of light energy
500
A 3kg box is placed on a far off planet and its weight is 90N. Calculate the strength of gravity on this planet.
30 N/kg
500
In your own words, describe how the solar system formed.
The gas and dust particles, of a nebula, were pulled together by gravity. As they combined and their mass grew so did their gravitational strength, which pulled even more matter in. Most of this matter formed a star, the Sun, while the remaining matter became the planets and moons.
500
Draw the position of the Sun, Earth and Moon during a Spring tide and during high tide (spring tide).
High tide / Spring tide: Sun, Earth and Moon in a straight line
Low tide / Neap tide: Sun, Earth and Moon for a right angle
500
List 3 forms of energy with a description of what they are.
Answers will vary
500
Draw a diagram showing the energy transformations that happen in a motorcycle. Label each form of energy as useful or wasteful.
Chemical energy transforms into kinetic (useful), thermal (wasteful) and sound (wasteful) energy.