Measurement Units and Biological Sizes

The video explains the importance of units in measurement, using a cookie recipe as an example. It covers various units for size, weight, and volume, emphasizing the metric system. The video details the scale of measurement from meters to nanometers, providing examples like blue whales, hummingbirds, ants, cells, and viruses. It highlights the need for microscopes to view extremely small units like micrometers and nanometers.

Why is it important to specify the unit of measurement when following a recipe?

• To make the recipe more interesting

• To save time

• To avoid using too much or too little of an ingredient

• To ensure the correct taste

Which system do scientists use to measure the size of organisms on Earth?

• Customary system

• Astronomical system

• Metric system

• Imperial system

How many times smaller is a centimeter compared to a meter?

• 1000 times

• 10000 times

• 100 times

• 10 times

What is a common length for a hummingbird?

• 5 meters

• 8 centimeters

• 10 millimeters

• 30 micrometers

How many times smaller is a millimeter compared to a centimeter?

• 10 times

• 100 times

• 1000 times

• 10000 times

What is the approximate diameter of a human skin cell?

• 30 centimeters

• 30 micrometers

• 30 millimeters

• 30 nanometers

How many times smaller is a micrometer compared to a millimeter?

• 1000 times

• 10000 times

• 100 times

• 10 times

What is the length of the Ebola virus in nanometers?

• 30 micrometers

• 80 nanometers

• 970 nanometers

• 5 micrometers

What tool is required to view objects measured in nanometers?

• Magnifying glass

• Binoculars

• Telescope

• Electron microscope