Microscopy GSCE SYI

What is the smallest unit of length?

• Nanometers

• Millimeters

• Meters

• Kilometers

Answer explanation

The smallest unit of length among the given options is nanometers. A nanometer is one billionth of a meter (1 nm = 10^-9 m), making it smaller than millimeters, meters, and kilometers. Nanometers are used to measure extremely small objects, such as atoms and molecules.

How many times is a kilometer larger than a meter?

• 10

• 100

• 1000

• 10000

Answer explanation

A kilometer is larger than a meter by a factor of 1000. This is because there are 1000 meters in a kilometer. Therefore, the correct choice is 1000.

If you have 6 millimeters, how many meters is that?

• 0.000006

• 0.006

• 0.06

• 6

Answer explanation

To convert millimeters to meters, you need to divide the number of millimeters by 1,000. In this case, you have 6 millimeters. Dividing 6 by 1,000 gives you 0.006 meters, which is the correct choice.

When converting from a smaller unit to a larger unit, what operation do you perform?

• Addition

• Subtraction

• Multiplication

• Division

Answer explanation

When converting from a smaller unit to a larger unit, you perform division. This is because the larger unit is made up of multiple smaller units, so you need to divide the smaller unit value by the conversion factor to find out how many larger units it represents.

If you want to convert 6 millimeters to micrometers, how many micrometers is that?

• 0.06

• 60

• 600

• 6000

Answer explanation

To convert 6 millimeters to micrometers, you need to multiply by 1000, as there are 1000 micrometers in a millimeter. So, 6 millimeters is equal to 6 x 1000 = 6000 micrometers. Therefore, the correct choice is 6000.

To convert 6 millimeters to nanometers, what is the value in nanometers?

• 60

• 600

• 6000

• 6000000

Answer explanation

To convert 6 millimeters to nanometers, we need to know that 1 millimeter is equal to 1,000,000 nanometers. So, to find the value in nanometers, we simply multiply 6 by 1,000,000, which gives us 6,000,000 nanometers. Therefore, the correct answer is 6,000,000 nanometers.

How many nanometers are in 1 micrometer?

• 10

• 100

• 1000

• 10000

Answer explanation

The question asks about the conversion from micrometers to nanometers. 1 micrometer is equal to 1000 nanometers. Therefore, the correct answer is 1000, not 10, 100, or 10000.

What type of microscope can see down to about 500 nanometers?

• Electron microscope

• Light microscope

• Scanning tunneling microscope

• Atomic force microscope

Answer explanation

The question asks about the type of microscope that can see down to about 500 nanometers. The correct answer is a Light microscope. Light microscopes, also known as optical microscopes, are capable of magnifying objects up to 1000 times their original size, allowing them to see objects as small as 500 nanometers.

How many centimeters are in a meter?

• 1

• 10

• 100

• 1000

Answer explanation

The question asks about the number of centimeters in a meter. The correct answer is 100. This is because the metric system is based on powers of 10, and there are 100 centimeters in a meter. Therefore, the option stating '100' is correct.

To convert from centimeters to millimeters, what do you do?

• Add 10

• Subtract 10

• Multiply by 10

• Divide by 10

Answer explanation

The question asks about the conversion from centimeters to millimeters. The correct answer is to multiply by 10. This is because there are 10 millimeters in a centimeter, so to convert from centimeters to millimeters, you need to multiply the number of centimeters by 10.