3 states of matters
Do solids have a fixed shape and volume?
Yes
What is density?
Density is the amount of mass in a specific volume
What is the definition of transparent?
Light can pass through
What are some of the properties of plastic?
hard and opaque, soft and transparent, flexible or rigid
What is a contact force?
Contact force is when objects touch and exert force on each other
What unit of measurement do we use to measure volume?
Mililitres and litres
Which object has a greater mass? A cork ball or a steel ball?
Steel ball
What is the definition of strong?
Can support weight without breaking
Where does plastic come from?
Petroleum
What is non-contact force?
When two objects interact, but they don´t make contact or touch each other
What is matter?
Matter is anything with mass and volume
If the object inside a container of water is denser than the water, will it float or sink?
Sink
What is the definition of elastic?
Returns to original shape after stretching
Name two natural plant based fibres
Cotton and linen
What happens when we stop applying force to elastic objects?
They return to their original shape when the force is removed
What is mass?
Mass is the amount of matter in an object
Do denser liquids go to the top or bottom of a container?
Bottom
What is the definition of flexible?
Can be bent without breaking
Name two natural animal based fibres
Wool and silk
What is gravity?
Gravity is a force that pulls objects with mass towards each other
What is volume?
Volume is the amount of space an object occupies
What is buoyancy?
If the solid object is denser than the water, it sinks. This is called buoyancy
What is the definition of hard?
Cannot be scratched easily
Name two man-made fibres
nylon and polyester
What is magnetism?
Magnetism is a natural force. Certain materials, especially metals, produce magnetic forces. These forces attract or repel other metal objects