Answer:
The thickness of sponge is the dependent variable in this investigation
Explanation:
This is because in the investigation, the amount of mass is the property to be varied while the thickness of the sponge is the property to be checked.
The thickness of the sponge is dependent on the amount of mass placed on it, so the thickness of the sponge depends on the mass.
Thus, the thickness of the sponge is the dependent variable in this instance while the amount of mass is the independent variable in this investigation.
In this scientific investigation about the relationship between the thickness of a sponge and the mass placed upon it, the 'dependent variable' is the sponge's thickness, and the 'independent variable' is the mass applied. The hypothesis may be that there's an exponential relationship between the mass and the sponge's thickness.
In the given scientific investigation, the dependent variable is the thickness of the sponge. This is because the thickness is the aspect of the experiment that changes (or is measured) based on the manipulation of another variable, which in this case is the amount of mass placed on top of the sponge, known as the independent variable. The investigator has control over the independent variable and observes whether changes to it cause a reaction or change in the dependent variable. In other words, the thickness of the sponge 'depends' upon the mass placed on it during the experiment. A possible hypothesis for this experiment may be that the thickness of the sponge decreases (get thinner) as more mass is placed upon it, suggesting an exponential relationship between the mass and the sponge's thickness.
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b. A planet's orbit covers equal distances in equal amounts of time; the speed of a planet's orbit depends on its distance from the Sun; the bigger the planet, the slower it moves.
c. Planets orbit in elliptical patterns; a planet's orbit covers equal areas in equal amounts of time; planets' orbits are shorter or longer depending on their distance from the Sun.
The correct answer to the question is : C) Planets orbit in elliptical patterns; a planet's orbit covers equal areas in equal amounts of time; planets' orbits are shorter or longer depending on their distance from the Sun.
EXPLANATION:
Before coming into any conclusion, first we have to understand three laws of Kepler on planetary motion.
First law: Every planets moves around the sun in elliptical orbits with the sun situated at one of their foci.
Second law: Planets sweep out equal areas in equal interval of time.
Third law: The square of time period of rotation of every planet is directly proportional to the cube of semi major axis.
Hence, from above we see that the option three corresponds to the Kepler's laws partially.
Hence, the correct statement is option three.
Answer: Decomposition
Explanation:
A chemical break down of a reactant into two or more products is known as Decomposition reaction. A substance decomposes to simpler substances.
It can be represented as:
AB → A + B
Example, water breaks down into oxygen and hydrogen
2 H₂O → 2 H₂ + O₂
Thus, the correct answer is:
A Decomposition reaction occurs when a substance is broken down into two or more simpler substances in a chemical reaction.
b. small tree and sapling
c. shrub
d. herb