Sort the questions based on whether they are better answered by an observational study or a controlled experiment.How effective is a new
toothpaste in reducing
cavities?
How does the daytime
• temperature affect the
formation of dew at night?
Which is a better absorber
of heat, an object painted
black or the same object
painted white?
Can plants prepare food
even in artificial light?
Why does a rolling ball slow
down as it moves?
Answers
Answer:
Following questions are better answered by observational study:
- How does the daytime temperature affect the formation of dew at night?
- How effective is a new toothpaste in reducing cavities?
Following questions are better answered by controlled experiment:
- Which is a better absorber of heat, an object painted black or the same object painted white?
- Why does a rolling ball slow down as it moves?
- Can plants prepare food even in artificial light?
Explanation:
An observational study is one in which the researcher doesn't manipulate anything.
In a controlled experiment, the researcher manipulate the outcome of the experiment and controls the factors that might affect the experiment to see different results in different conditions.
So, for questions over which research do not have any control, mostly natural processes, observational study is a better option.
However, to check why a rolling ball slow down, controlled experiments are done to find out all the factors.
Plants placed in artificial light is also an controlled experiment as the researcher will himself place the plants in artificial light and keep them away from natural light.
Similarly, to check if color of the object affects the amount of heat absorbed by that object, a controlled experiment must be performed. Same object should be painted white and observed and then painted black and observed.
Related Questions
A Carnot heat engine has an efficiency of 0.400. If it operates between a deep lake with a constant temperature of 298.0k and a hot reservoir, what is the temperature of the hot reservoir?
If a 2,300 kg car is accelerating at 16 m/s^2, what is the force it is producing?
Our friend Peter back at the zoo is using a crane to lift an elephant into an enclosure. The elephant weighs 10,000 N. The crane lifts the elephant 5 meters in 25 seconds. How much power was used to accomplish this task?
What's the opposite of vaporization
Answers
Answer:
In contrast, wind turbines produce no greenhouse gases when generating electricity. We should note that both noise and visual pollution are environmental disadvantages of wind turbines. However, these factors don't have a negative impact on the earth, water table or the quality of the air we breathe.
B) erosion
C) volcano
D) landslide
Answers
^_^...hope this helps!!!!
Answers
Answer:
__________
Explanation:
in the same direction as the force
B.
independent of the force
C.
in the opposite direction of the force
D.
perpendicular to the force
Answers
Answer:
In the same direction as the force
Explanation:
Consider an object in which force is applied. The force applied moves the object in the direction of the force.
Suppose if the force is applied to the moving object in that case object moves in the direction of the stronger force.
Thus, according to the given question the applied force moves the object in its direction.
in the same direction as the force (btw acceleration and the net force have the same direction)
1.How close it is to the sun?
2.Length of the time to orbit the sun.
3.If they have moons,how many?
4.Describe the Surface And Atmosphere.
6.Size of the planet
7.How does it rotates (Direction)
8.If they have rings,How many?
9.The diameter of the planet
10.The temperture of the planet.
11.Does the planet has other names? What are they?
12.Definition of Terrestrial
13.Definition of Jovian
Answers
Inner planets:
Mercury
Venus
Earth
Mars
Outer planets:
Jupiter
Saturn
Uranus
Neptune
2). The farther a planet is from the sun, the longer it takes
to orbit the sun. Mercury ... 88 days. Earth ... 365 days.
Jupiter ... 12 years. Neptune ... 165 years.
3). Mercury & Venus ... no moons
Earth - 1
Mars - 2
Jupiter - more than 65
4). Mercury ... cratered, no atmosphere
Venus ... cratered, thick cloudy atmosphere
Mars ... dry, cratered, slight atmosphere, like 1% or Earth's
Jupiter, Saturn, Uranus, Neptune
We can't see any surface. If any of them even
HAS a surface, it's thousands of miles under a
thick atmosphere of methane gas.
5). Missing from the list
6). Here's a list from the biggest planet to the smallest one.
The numbers in parentheses are the radius of the planet --
half of the diameter:
Jupiter (69,911 km / 43,441 miles) – 1,120% the size of Earth
Saturn (58,232 km / 36,184 miles) – 945% the size of Earth
Uranus (25,362 km / 15,759 miles) – 400% the size of Earth
Neptune (24,622 km / 15,299 miles) – 388% the size of Earth
Earth (6,371 km / 3,959 miles)
Venus (6,052 km / 3,761 miles) – 95% the size of Earth
Mars (3,390 km / 2,460 miles) – 53% the size of Earth
Mercury (2,440 km / 1,516 miles) – 38% the size of Earth
7). At least seven of the planets rotate in the same direction.
There's something different about one of them ... it may be Uranus
but I'm not sure. You'll have to look this up.
8). Saturn has the famous rings, that you can almost see
with only binoculars.
Spacecraft sent to observe the outer planets have detected
very thin rings around Uranus and Neptune.
9). Included in #6.
10). I don't have complete info. Generally, the closer the planet
is to the sun, the hotter it is. But there are a few exceptions.
I think Venus ... the second one from the sun, is actually hotter
than Mercury.
11). Just about every language has its own name for each planet.
12). "Terrestrial" means "like Earth" ("Terra").
The terrestrial planets are the ones that have solid surfaces
and are made of rock.
Mercury, Venus, Earth, and Mars.
13). "Jovian" means "like Jupiter".
Either no solid surface, or very small, inside a big deep gas ball.
Jupiter, Saturn, Uranus, Neptune.
Answers
Answer:
Everything that has mass has gravity. The greater the amount of mass, the greater the gravity. And the closer objects are to each other, the stronger their gravitational pull is. The reason we have weight is because of the gravitational pull on our bodies (our mass) by the Earth.
Explanation:
Answer:
Everything that has mass has gravity. The greater the amount of mass, the greater the gravity. And the closer objects are to each other, the stronger their gravitational pull is. The reason we have weight is because of the gravitational pull on our bodies (our mass) by the Earth.
Explanation: