Biology
Charles Darwin
Three people weighing 65 kg, 70 kg, and 85 kg jump from 1 meter off the ground at the same time. If there was no air resistance, who would hit the ground first?
They would hit the ground at the same time
An isotope has a half-life of 30 minutes. Given an original sample of 100 g of the isotope, how much will be left after an hour?
25 grams
Glaciers and ice caps contain most of the _____ on Earth
freshwater
How many planets are in our solar system?
8
How many chromosomes do humans have?
46
Radioactive isotopes decay until they _____
are stable
A substance that is used to speed up a chemical reaction but is not used as part of the reaction is called a __________.
catalyst
Mount St. Helens, Mount Rainier, and Mount Vesuvius are all examples of what?
volcanoes
What is a solar eclipse?
when the Moon passes between the Sun and Earth
A change of the DNA in an organism that results in a new trait is known as what?
Mutation
When a charged particle moves left to right relative to a magnetic field, it will experience a force. This force is always in a direction that is _____ to both the magnetic field and the particle's direction of travel.
Perpendicular
A chemical reaction in which energy is released is called what?
Exothermic
What is a lichen secretion?
acids that break down rock material and slowly create new soil
How many constellations are there?
88
cornea in the eye
What is the main source of metabolic energy?
carbohydrates
When the sum of the masses of all the nucleons within the nucleus is less than the mass of the nucleus, what is the reaction deemed?
favorable
Which weather phenomenon depends on moisture, a lifting mechanism, and instability to occur?
thunderstorms
What is an astronomical unit?
the distance from the earth to the sun.
Deamination
The _____ are used to determine the direction of magnetic force, current, or magnetic field.
right hand rules
What is the minimum amount of extra energy required by a reacting molecule to get converted into product?
Activation energy
What are wide, windy circulation cells found in the tropics along the equator called?
Hadley cells
Titania, Miranda and Bianca are all moons of which planet in our solar system?
Uranus