40 ! solve question on page 2 & 4.

(1)

Variables:

Test Variable:

The test variable is temperature/ heat.

Outcome variable:

The response/outcome variable is mass.

Controls:

Negative Control:

A solid stick of butter at room temperature.

Positive Control:

A stick of butter whose mass before and after heating is known.

(2)

Upon measurement, the mass of the butter was not found to be changing drastically. Butter does not lose or gain mass when heated to meting stage. A negligible decrease in mass take place when the moisture in the solid butter evaporates. Other than that, both solid and molten butter have similar masses.

The hypothesis,"If butter is heated, there was no mass created when it melted" was proven to be correct.

Explanation:

Independent Variable:

Dependent/ Response Variable:

Controls:

Positive Control:

Negative Control:

the correct answer is - d. china has a large and growing population.

the fact that china has a large (the biggest) population, and it is still growing, doesn't hinder the agriculture production in the country. in fact, it can for increased production in the agriculture, since there's more labor force, as well the sheer mass of people produces lots of scientists that come up with new inventions as to how to improve this sector. nice example is the inner mongolia region in china, in general dominated by the gobi desert, but few scientist came up with a nice idea as to how to make the region productive by using plants that are very resistant to droughts, so lots of people have been employed, and the region is becoming greener and greener each year, and the production of food in this region is also increasing.

answer: grassland biomes are closer to the equator and receive more rain.

grasslands are biomes that are dominated by grasses rather shrubs and trees. savanna are biomes that exhibit grasses, shrubs and small tree as vegetation. grasslands are located near the equator of the earth. these are found in north america. savanna biomes are found in africa, south america, australia and india. grassland exhibit moderate climatic conditions, it receives   amount of rainfall higher than savanna.   therefore, savanna exhibit dry and hot climatic conditions.