1 It is hard to imagine how big a billion is. A billion is 1 000 000 000 (or one thousand

million). There are 1 000 millimetres in 1 metre and 1 000 metres in 1 kilometre.

How many millimetres are in 1 kilometre?

Plants make their own food. The chemical reaction for this process is shown in the equation below. CO2 + H2O + energy C6H12O6 + O2 What are the products in this chemical reaction? A. C6H12O6 + energy B. C6H12O6 + O2 C. CO2 + H2O D. H2O + energy

Which of the following is NOT positively influenced by physical activity? A. cardiovascular disease B. obesity C. osteoporosis D. allergies

Describe an important difference between an artificial ecosystem and a natural ecosystem

How many kingdoms are in the domain Eukarya? one four six nine

Which does this tissue work with to carry out transpiration? vascular and parenchyma tissue dermal and vascular tissue ground and dermal tissue parenchyma and ground tissue

Can energy be transferred from animal to animal

The more stomata the more water loss?

Why does it take a long time to develop a new variety of tomato? A. Changes in traits happen gradually, over many generations. B. Many plants resist change. C. Tomatoes cannot acquire new traits. D. A species cannot change over time.

Select the one true statement. Vacuoles store nutrients, water, and waste in animal cells. Plant cells can have chloroplasts but do not have a cell wall.

Using water more effectively A. Protects the environment B. Causes the loss of natural pollution filters C. Increases with contamination D. All of the above