(Q).
The Earth revolving around the Sun causes the seasons to change on its axis, and weather changes from season to season. Given these facts, what causes weather to change among the following options: - wind and erosion - Earth revolving around the sun - degrees Celsius - exposure to cold - Colder temperatures on Mars - Forecasting sunny weather - pressure differences. - Performing a rain dance
(A).
Earth revolving around the sun

(Q).
Being exposed to wind can cause erosion of soil, and soil erosion causes crop yields to decrease. Given these facts, what is a possible negative effect of exposing soil to wind among the following options: - It used to be covered by water - exposure to cold - decrease in crop yields - greater food production - elimination of harmful pests - a tree falling - wind power increases - Damages them
(A).
decrease in crop yields

(Q).
Gills are used for breathing water by aquatic animals, and fish are animals that live in water and breathe using gills. Given these facts, how do fish breathe among the following options: - they body they live in - With their nose - With their eyes - With their gills - WIth their fins - exoskeleton - matter vibrating - By coral exoskeletons
(A).
With their gills