Astronomy
Elements
Ecosystems
Newtons laws
Lab safety
100
velocity=107,300 km/h (or if you prefer 67,062 miles per hour
At what speed does the earth move around the sun?
100
There are about 110 known elements
About how many known elements are there?
100
A biological community of interacting organisms and their physical environment.
What is the definition of an ecosystem?
100
In special relativity, the conservation of mass does not apply if the system is open and energy escapes. However, it does continue to apply to totally closed (isolated) systems. If energy cannot escape a system, its mass cannot decrease. In relativity theory, so long as any type of energy is retained within a system, this energy exhibits mass. Also, mass must be differentiated from matter (see below), since matter may not be perfectly conserved in isolated systems, even though mass is always conserved in such systems. However, matter is so nearly conserved in chemistry that violations of matter conservation were not measured until the nuclear age, and the assumption of matter conservation remains an important practical concept in most systems in chemistry and other studies that do not involve the high energies typical of radioactivity and nuclear reactions. [edit]
What is the meaning of the conservation of mass?
100
WAIT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
What do you while waiting for your teacher to begin the lab?
200
The star begins as a cool cloud of gas, well to the right (cold side) . Under its own gravity, the cloud begins to collapse. As it collapses, it releases its gravitational energy as radiation. So a young star is cool but bright. We usually don't see these proto-stars, however, because they are generally shrouded in dust and only give off light in the far infrared part of the spectrum. The proto-star continues to collapse, and as it does, it gets hotter and hotter, moving to the left in the HR diagram. "Stars" less than a percent of the Sun's mass eventually halt their collapse due to gas pressure. These stars are "brown dwarfs" or "giant planets," like Jupiter. They never ignite their hydrogen, and gradually dim away.
What is the life cycle of a star?
200
You are Wrong as usual ! The elements of the periodic table are organized by atomic number.
elements in the periodic table are arranged by...
200
Habitat
The _________________ is part of the Earth in which life exists. It includes the land, water, and air/atmosphere. A. biosphere B. habitat C. niche D. community
200
What Goes up must come down.
What is Law of Gravity?
200
So Space Walrus Don't gauge out your eyes.And eat your soul. (Now I hope you have a better understanding why scientist wear googles.)
Why Do we wear googles?
300
There are 88 official constellations.
How many constellations are there now?
300
You will not information about the atomic radius of an atom.
Which of these things will you NOT find in the periodic table on the wall?
300
Decomposers
2. ________________ are organisms that break down and obtain energy from dead organic matter. A. Producers B. Decomposers C. Autotrophs D. Herbivores
300
A
Which of the following statements is true? Need a Hint? A) When speed increases gradually, average speed and instantaneous speed are the same. B) An object does not accelerate if it turns and maintains constant speed. C) Velocity of a moving object is the distance traveled divided by the time needed to travel the distance. D) If a moving object slows down, it is accelerating.
300
TO keep other toxic substances and materials off of your hands.
Why Do we Wear gloves?
400
Our everyday experience teaches us that an object must be "pushed" by a force in order to keep it moving. Otherwise, it will slow down and eventually stop. But this intuition is absolutely wrong. If an object is moving, then a force is required *to slow it down or stop it*, not to keep it moving. (Hence, "Objects in motion tend to stay in motion. Objects at rest tend to stay at rest.") In our everyday experience, it's the force of friction that tends to stop Earth-bound objects from moving forever. But for the Earth rotating on its axis, there is no force working to counteract the rotation (except the tidal effect of the Moon, but that's working very slowly), so you don't need to have any input energy to keep it spinning.
What makes the Earth rotate?
400
Dmitri Mendeleev is credited with designing the modern periodic table.
Which scientist came up with the concept of a periodic table that included all of the known elements?
400
habitat
The full range of physical and biological conditions in which an organism lives and the way in which the organism uses these conditions is known as a _______________. A. biosphere B. habitat C. niche D. community
400
Friction
__________ is a force that resists motion between two surfaces that are in contact
400
Because mrs.rameriez says so.
Why Do you wear closed toed shoes in the lab
500
if Pluto were discovered now, most likely we would not call it a planet. However, most astronomers think that a change in Pluto's status would be of limited usefulness while confusing, so it will probably continue to be considered a planet.
Is Pluto a planet?
500
The modern periodic table isn't the only way to categorize the elements.
Is the periodic table the only way to classify elements?
500
Ecology
The scientific study of interactions among organisms and between organisms and their environment is _________________. A. biosphere B. ecology C. trophic level D. community
500
Issac
What is Newtons First name
500
do not get involved.Call for help and watch the teacher clean up.
What do you do when a flammable substance is on your lab partner.
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