grade 5 , con 6 , lesson 3

Among mixtures which are made up of solid materials only is the mixture of.........

• salt and water.

• sugar and water.

• sand and rocks.

• oxygen and helium.

Salt can be separated by ..... of salty water.

• melting

• evaporation

• freezing

• condensation

By adding baking soda to vinegar, a............ is formed.

• powder

• compound

• mixture

• solid matter

By adding iodine to starch, the color of the formed compound will change into..........

• dark blue.

• dark green.

• orange.

• yellow.

If we mix two equal masses of salt and oil so, their total mass will ...............after mixing.

• equal to zero

• decrease

• increase

• not change

To separate sand only from salty water, we can use ..........process.

• filtration

• evaporation

• melting

• freezing

A compound has all the following properties, except that its components...........

• combine chemically.

• form new substance.

• change in their shapes

• do not change chemically or physically.

The.......... of iodine will not change after mixing it with starch.

• mass only

• color only

• color and mass

• properties and mass

If we have 6 g of water and 6 g of sugar, after mixing them the mass of whole mixture will be..............g

• 15

• 10

• 12

• 6

If we mix 150 g of banana with 50 g of apple, the mass of banana only will be .............g after mixing.

• 50

• 100

• 200

• 150