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Give me 3 examples of physical changes and 3 examples of chemical changes.
Physical changes: when ice melts, when you make something with plasticine. Chemical changes: when you cook food, when food spoils.
Physical changes produce new substances. True or false?
False. Physical changes affect the state, position and shape of matter.
Natural materials can be found in the nature and their origin can be... (there are 3).
Animal, vegetable (plant) and mineral origin.
Tell me the difference between "heterogeneous mixtures" and "homogeneous mixtures" using an example.
In the heterogeneous mixtures you can see the different types of matter (pizza), but in the homogeneous mixtures you cannot (milkshake).
Define "pure substance". Give me 2 examples.
A pure substance is made up of only one type of matter. For example: sugar, salt, water.
Which state of matter can be compressed more easily? Solid, liquid or gas?
Gas.
Honey has more viscosity than water. True or false?
True. The viscosity is the resistance of a liquid to flow.
Elasticity determines how easily something recovers its original shape when it is deformed. True or false?
True. For example a hair band.
Hardness determines the resistance that an object has to be... a) scratched b) broken
a) scratched
Gases haven't got a fixed shape and a fixed volume.
True
Liquids have got a fixed shape and a fixed volume.
False. Liquids haven't got a fixed shape.
Solids have got a fixed shape and a fixed volume. True or false?
True
Mention the 3 states of matter.
Solid, liquid and gas.
Mass tells us... a) how much matter is in an object b) the space an object occupies.
A) Matter tells us how much matter is in an object.
Matter is anything that has volume, but not mass. True or False?
False. Matter has volume and mass.
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