| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.31 |
| Score | 0% | 66% |
Which of these is matter than cannot be separated into different types of matter by ordinary chemical methods?
element |
|
molecule |
|
atom |
|
compound |
An element is matter than cannot be separated into different types of matter by ordinary chemical methods.
During digestion, the kidneys filter substances from the blood. Which of the following is not filtered by the kidneys?
fats |
|
salt |
|
water |
|
minerals |
Chemical waste like excess water, minerals, and salt are filtered from the blood by the kidneys and secreted into the urine. Urine is transported from the kidneys to the bladder through ureters.
The small intestine utilizes enzymes produced where?
liver |
|
small intestine |
|
pancreas |
|
all of these are correct |
The small intestine is where most digestion takes place. As food travels along the small intestine it gets broken down completely by enzymes secreted from the walls. These enzymes are produced in the small intestine as well as in the pancreas and liver. After the enzymes break down the food, the resulting substances are then absorbed into the blood via capillaries in the small intestine walls.
Water freezing or boiling is an example of which of the following?
cooling |
|
sublimation |
|
heating |
|
phase transition |
A substance undergoes a phase transition when it moves from one state of matter to another, for example, when water freezes or boils.
The asteroids in the Kuiper belt are composed of which of the following?
minerals |
|
frozen methane, ammonia, and water |
|
rock |
|
gaseous methane, ammonia, and water |
The Kuiper Belt is similar to the asteroid belt but much larger. Extending beyond the orbit of Neptune, it contains objects composed mostly of frozen methane, ammonia, and water. Most notably, the Kuiper Belt is home to Pluto, a dwarf planet that, until a 2006 reclassification, was considered the ninth planet of the solar system.