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.
An animal that only eats meat is called a carnivore An animal that eats both meat and vegetation is called an omnivore An animal that only eats vegetation is called a herbivore
a plant cell has a large centralised vacuole containing cell sap and has a cell wall and an animal cell contains centrioles while a plant cell does not. a plant cell contains chloroplast while an animal cell does not
