Science Grade 7 Exercise | Baamboozle - Baamboozle

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Acid + base --> ...... + .......

salt + water

Changing state of matter from liquid to solid is called?

freezing

Mixture divided into 2 categories, they are .... and ....

homogeneous and heterogeneous mixture

Mostly solid, ductile and malleabe are the properties of ......

Metal

State 3 properties of acid. taste? pH? example?

taste sour. pH less than 7. example : Orange, lemon, pineapple

State 3 properties of base. taste? pH? example?

Taste bitter. pH more than 7. example : bleach, soap, ammonia

Periodic table shows all known .....(element/compound/mixtures?)

Element

Mercury is liquid. Mercury is an example of ...

Metal

Dull, brittle and insulator are the properties of ......

Nonmetals

Give 3 example of homogeneous mixture

salt water, sugar water, syrup, etc

Turns litmus blue into blue, Turns litmus red into blue. the substance is .... (acid/base/neutral?)

base

Changing state of matter from gas to liquid is called?

condensation

Baking soda (NaHCO₃) is an example of .... (element/compound/mixture?)

Compound

Changing state of matter from solid to liquid is called?

Melting

Turns litmus blue into red, Turns litmus red into red. the substance is .... (acid/base/neutral?)

Acid

mineral water is a substance with pH = 7 or it is called .....

neutral

Matter is divided into 4 states, they are ....

Solid, liquid, gas and plasma

vinegar have pH = 4. vinegar is considered .... (Strong acid/weak acid/strong base/weak base?)

weak acid

Semiconductor, brittle and have metallic cluster are the properties of .....

Metalloid

Bleach is an example of (Acid/Base/Neutral?)

Base

bleach have pH = 13. bleach is considered .... (Strong acid/weak acid/strong base/weak base?)

Strong Base

HCl have pH = 2. HCl is called .... (Strong acid/weak acid/strong base/weak base?)

Strong acid

Give 3 example of heterogeneous mixture

milk, river water, fog, smog, etc

Special type of substances are used to test whether a substance is acidic or basic.

Indicators

Changing state of matter from liquid to gas is called?

Vaporization