1. the amount of space an object occupies is?
2. what is the difference between a law and theory
3. what is the difference between mass and weight?
4. how do you find the volume of an irregular object?
5. what is used to measure salinity?
6. what is average salinity in the ocean?
7. what is used to measure turbidity?
8. what is used to catch plankton?
9. what would we use to collect samples of sediments?
10. what was the name of the underwater laboratory?

Question

Accepted Answer

### Question 1
# Brief Explanations:
The amount of space an object occupies is defined as its volume. In the context of physical properties of matter, volume is a fundamental concept, especially in fields like Physics (a subfield of Natural Science) which deals with the characteristics of objects and substances.
# Answer:
Volume

### Question 2
# Brief Explanations:
In science (particularly in Natural Science subfields like Physics, Chemistry, Biology), a scientific law is a description of a natural phenomenon (e.g., Newton's laws of motion describe how objects move) that is observed to occur consistently under certain conditions. It often uses mathematical relationships to summarize the phenomenon. A scientific theory, on the other hand, is an explanation of why the phenomenon occurs (e.g., the theory of evolution explains how species change over time). Theories are well - supported by evidence from multiple experiments and observations, while laws are more about the "what" of a phenomenon and theories about the "why".
# Answer:
A scientific law describes a natural phenomenon (often with math, e.g., Newton’s laws), while a theory explains why it occurs (e.g., theory of evolution). Laws summarize “what,” theories explain “why.”

### Question 3
# Brief Explanations:
In Physics (Natural Science), mass is the amount of matter in an object. It is an intrinsic property, meaning it does not change with location (e.g., the mass of a rock is the same on Earth or on the Moon). Weight, however, is the force exerted on an object due to gravity. It is calculated as $W = mg$, where $m$ is mass and $g$ is the acceleration due to gravity. Since gravity can vary (e.g., $g$ on the Moon is about $\frac{1}{6}$ of $g$ on Earth), the weight of an object can change depending on where it is, but its mass remains constant.
# Answer:
Mass is the amount of matter (intrinsic, constant). Weight is gravity - related force ($W = mg$, changes with $g$).

### Question 4
# Explanation:
## Step1: Identify the method
To find the volume of an irregular object, we use the water displacement method. First, we take a graduated cylinder (or a container with volume markings) and fill it with a known volume of water, let's call this initial volume $V_1$.
## Step2: Submerge the object
Then, we carefully submerge the irregular object completely in the water. The water level will rise because the object displaces some water. We then measure the new volume of water (including the object), call this $V_2$.
## Step3: Calculate the volume
The volume of the irregular object $V$ is equal to the difference between the final volume and the initial volume, so $V=V_2 - V_1$.
# Answer:
Use water displacement: $V = V_2 - V_1$ (where $V_1$ = initial water volume, $V_2$ = volume with object).

### Question 5
# Brief Explanations:
To measure salinity (the amount of salt in a solution, often in oceanography which is a subfield of Natural Science, specifically Environmental Sciences or Oceanography), a refractometer or a salinometer can be used. A refractometer measures the refractive index of the water, and since the refractive index is related to the salt concentration, it can be used to determine salinity. A salinometer is a device specifically designed to measure the electrical conductivity of water (since salt water is a good conductor, and the conductivity is related to the salt concentration) to find the salinity.
# Answer:
A refractometer or salinometer (measures via refractive index or conductivity).

### Question 6
# Brief Explanations:
In oceanography (Natural Science, Environmental Sciences subfield), the average salinity of the ocean is about 35 parts per thousand (ppt). This means that for every 1000 grams of ocean water, there are approximately 35 grams of dissolved salts (mostly sodium chloride, but also other salts like magnesium sulfate, etc.).
# Answer:
Approximately 35 parts per thousand (ppt).

### Question 7
# Brief Explanations:
To measure turbidity (the cloudiness or haziness of a fluid, often in water bodies, related to Environmental Sciences in Natural Science), a turbidity meter (also called a nephelometer) is used. Turbidity meters work by shining a light through the water sample and measuring the amount of light that is scattered by the suspended particles in the water. The more scattered light, the higher the turbidity.
# Answer:
A turbidity meter (nephelometer, measures light scattering).

### Question 8
# Brief Explanations:
To catch plankton (tiny organisms in water, studied in Biology, a subfield of Natural Science), a plankton net is used. Plankton nets are made of fine - meshed material. They are dragged through the water (either by hand in a small body of water or attached to a boat in the ocean), and the plankton are trapped in the net as the water passes through the mesh.
# Answer:
A plankton net (fine - meshed, dragged through water).

### Question 9
# Brief Explanations:
To collect samples of sediments (particles that settle at the bottom of water bodies, related to Environmental Sciences or Geology in Natural Science), a sediment corer or a grab sampler can be used. A grab sampler is a device that is lowered to the sediment surface and "grabs" a sample of the sediment. A sediment corer is used to take a more continuous sample of the sediment column, allowing scientists to study the layers of sediment over time.
# Answer:
A sediment corer or grab sampler.

### Question 10
# Brief Explanations:
One of the well - known underwater laboratories was "Aquarius". Aquarius is an underwater research facility that is used by scientists to conduct research on marine ecosystems, oceanography, and other related fields. It is located in the Florida Keys National Marine Sanctuary.
# Answer:
Aquarius

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