Changing a river into a lake is basically what a large dam does. One reason we do this to create reservoirs of fresh water.

Which of the following statements is true? Very fertile soil is found near the top of a mountain. Moisture is the least important climactic factor in soil formation. Hydrogen ions (H+) make soil fertile and loamy.

Is a stereotype always negative? Can they be positive?

Where do nutrients first enter the blood? A. Through cells in the nephrons of the kidneys B. In the liver, where glucose is delivered to the blood C. In the kidney, where wastes are sent to the bladder D.

How can you tell that mitosis is a continuous process?

Which of the phases of the Moon produces the highest and lowest tides on Earth? A. Crescent Moon B. Gibbous Moon C. First Quarter Moon D. Full Moon

A cell contains a 30% solute concentration and 70% water concentration. If the cell is placed in a solution that is 60% solute and 40% water, what will happen to the cell, and what condition is the cell in?

During upwelling, nutrient-rich water rises to the surface. How would this most likely affect the biotic components of the ecosystems where the upwelling is taking place?

Determine whether each activity impacts land resources in a positive or negative way. Drag each term to the correct category.

1. List 2 examples of positive feedback loop in you body 2. List 2 examples of negative feedback loop in your body

Which of the following genotypes is homozygous recessive? A.) ss B.) Bb C.) TT D.) XY