Solar and luna Eclipse

Solar Eclipse (day)

How do they occur? A solar eclipse occurs when the moon gets between Earth and the sun, and the moon casts a shadow over Earth. 

What do we see? The Sun is now completely hidden, revealing the full glory of the solar corona. These few minutes of the total solar eclipse are the only times we on Earth can see the corona, the Sun's upper atmosphere, which streams out into space above the sun's surface.

When was the last one?

1965

When is the next one?

The next total solar eclipse in New Zealand is in 2454 days on Saturday, 07/22/2028.

Diagram/pictures 

Lunar Eclipse (Night)

When do they occur?

A lunar eclipse occurs when the Moon passes through the Earth's shadow, just as a solar eclipse occurs when part of the Earth passes through the Moon's shadow.

What do we see?

During a total lunar eclipse, the Earth blocks the Sun's light from reaching the Moon. Astronauts on the Moon would then see the Earth completely eclipse the Sun.

When was the last one?

January 21, 2019

When is the next one?

May 15-16, 2022

Diagram/pictures

Testing for hydrogen gas

 A week ago we did an experiment on testing for hydrogen gas, the aim was to show that hydrogen gas is produced when a metal reacts with acid.

Equipment: a test tube, a boiling tube, bunsen burner, wooden splint,a bottle of acid, a piece of metal, safety glasses.

Method: 

1.  Light your bunsen burner.

2. Add a sample of metal to your test tube. Add 2 mL of acid.

3. Carefully invert the boiling tube above the test tube containing the metal and acid.

4. Hold the test tubes together for a few minutes, allowing time for the inverted boiling tube to fill the gas.

5. When you think the tube is full, your partner should light the wooden splint.

6. Carefully, but quickly, tilt the boiling tube full of gas upwards and insert the burning splint into the mouth of the test tube.

Observations: it made a loud popping noise 

my experiment made a really loud noise because I only waited about 20- 30 seconds instead of a few minutes.