Alright, i am homeschooled and go to keystone homeschool, i am taking 9th grade biology and need someone to check and help me wi
th some questions... thanks!
A meter is a unit of length. How many meters are there in one kilometer (km)?
i put: 1000
A liter is a unit of volume. How many milliliters are there in one liter (L)?
i put: 1000
There are 1000 milligrams in one kilogram. true or false?
i put: false
Which salt concentration served as the experimental control in lab?
i put: 0m - not sure about this question...
Four groups of mice consume different amounts of sweetener in their food. The control group is the one that receives ____.
i put: extra food
What is a hypothesis?
i put: a general statement made to infer a specific conclusion, often in an "if . . . then" format.
Some scientific data are obtained through observation rather than experimental results. true or false?
i put: TRUE
You probably believe that Earth is spherical. But as we look around, it certainly appears that Earth is flat. One classmate suggests that if you call someone on the 'other side' of the world by phone, they can verify that it is midnight there when it is noon here. Another student reminds you of the picture taken of the spherical Earth from the moon landing. Your teacher explains the ancient observation that when the Sun was directly overhead on one day near the equator, a pole some hundreds of miles away to the north still cast a shadow. What, then, is the best scientific basis for considering that Earth is spherical?
i put:Reasoning must be used to arrive at a model that best fits the observations.
the questions above need to be checked and the questions below need answering:
Which statement is NOT true about science?
Science approaches data in a subjective manner.
Science attempts to avoid prejudice in making judgments.
Science is concerned about understanding the natural world.
Science gains information by observing and testing the natural world.
Which of these statements represent a possible hypothesis from the salt boiling lab?
Addition of salt to water will cause the boiling temperature of the water to increase.
Addition of salt to water will cause the boiling temperature of the water to decrease.
Addition of salt to water will cause the boiling temperature of the water to neither increase nor decrease.
All of these represent hypotheses.
Scientists typically measure temperature using the Fahrenheit scale.
TRUE
FALSE
The dependent variable in an experiment is the factor that is controlled by the experimenter.
White matter is the slightly more pale tissue in the areas of the brain and spinal cord. It consists of nerve fibers with their myelin sheaths (the fatty substance that surrounds and "protects" the axon.
The most important abiotic factors include water, sunlight, oxygen, soil and temperature. Water (H2O) is a very important abiotic factor – it is often said that “water is life.” All living organisms need water.
