ཚན་རིགScienceKids, ages 11 to 14English

Forces and motion

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Questions

1Multiple choice · 20 s · 10 ptsNot played yet
What is the unit used to measure force?
- AThe kilogram (kg)
- BThe joule (J)
- CThe metre (m)
- DThe newton (N)
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2Multiple choice · 20 s · 10 ptsNot played yet
On Earth, about how much does an object with a mass of 1 kg weigh?
- AAbout 10 newtons
- BAbout 1 newton
- CAbout 100 newtons
- DAbout 1,000 newtons
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3Multiple choice · 30 s · 10 ptsNot played yet
An astronaut with a mass of 70 kg travels to the Moon. What happens to her mass and her weight?
- ABoth get smaller
- BMass gets smaller, weight stays the same
- CBoth stay exactly the same
- DMass stays the same, weight gets smaller
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4True or false · 20 s · 10 ptsNot played yet
Gravity only acts on objects while they are falling.
- ✓True · བདེན།
- ✕False · རྫུན།
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5Multiple choice · 20 s · 10 ptsNot played yet
Which force slows a bicycle down when you squeeze the brakes?
- AFriction
- BUpthrust
- CMagnetism
- DGravity
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6Multiple choice · 20 s · 10 ptsNot played yet
How does the big canopy of the parachute in the picture slow the skydiver down?
- AIt switches off gravity
- BIt makes the skydiver lighter
- CIt greatly increases air resistance
- DIt pushes the skydiver sideways
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7Multiple choice · 20 s · 10 ptsNot played yet
What happens if you push the north poles of two magnets towards each other?
- AThey pull together and stick
- BThey lose their magnetism
- CThey push each other away
- DNothing happens at all
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8Multiple choice · 20 s · 10 ptsNot played yet
Which of these metals is attracted to a magnet?
- ACopper
- BAluminium
- CGold
- DIron
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9Multiple choice · 20 s · 10 ptsNot played yet
Iron filings sprinkled around the magnet in the picture form curved lines. What do these lines show?
- AAn electric current
- BThe magnetic field
- CHeat leaving the magnet
- DSound waves
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10Multiple choice · 20 s · 10 ptsNot played yet
The seesaw in the picture turns around a pivot in the middle. Which simple machine is it?
- AA pulley
- BA lever
- CA screw
- DA wedge
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11Multiple choice · 20 s · 10 ptsNot played yet
The rope in the picture runs over a wheel to lift the bucket out of the well. Which simple machine is this?
- AA pulley
- BA lever
- CA ramp
- DA screw
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12Multiple choice · 20 s · 10 ptsNot played yet
Which scientist described the law of gravity and three laws of motion in a book published in 1687?
- AGalileo Galilei
- BAlbert Einstein
- CIsaac Newton
- DMarie Curie
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13Multiple choice · 20 s · 10 ptsNot played yet
Which of these is the correct way to work out speed?
- ADistance divided by time
- BTime divided by distance
- CDistance multiplied by time
- DMass divided by time
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14Multiple choice · 30 s · 10 ptsNot played yet
A cyclist rides 30 kilometres in 2 hours. What is the cyclist's average speed?
- A60 km/h
- B15 km/h
- C32 km/h
- D28 km/h
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15True or false · 20 s · 10 ptsNot played yet
In a vacuum, a hammer and a feather dropped together hit the ground at the same time.
- ✓True · བདེན།
- ✕False · རྫུན།
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16Multiple choice · 20 s · 10 ptsNot played yet
A book lies still on a table. Which statement about the forces on it is correct?
- AThe forces are unbalanced
- BNo forces act on it
- CThe forces are balanced
- DOnly gravity acts on it
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17True or false · 20 s · 10 ptsNot played yet
An object speeds up, slows down or changes direction only when the forces on it are unbalanced.
- ✓True · བདེན།
- ✕False · རྫུན།
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18Multiple choice · 20 s · 10 ptsNot played yet
What is the upward push of water on a floating object called?
- AFriction
- BGravity
- CTension
- DUpthrust
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19Multiple choice · 20 s · 10 ptsNot played yet
Why can the huge steel ship in the picture float?
- ASteel is lighter than water
- BIt pushes aside lots of water
- CGravity does not pull on ships
- DThe wind holds it up
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20True or false · 20 s · 10 ptsNot played yet
Friction is always a nuisance and never useful.
- ✓True · བདེན།
- ✕False · རྫུན།
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