Ions
pH Scale
Ecology
Sport
Riddles
100

This type of ion has a positive charge after losing electrons

What is a cation?

100

A pH of 7 is considered this.

What is neutral

100

This type of symbiotic relationship benefits both species involved.

What is mutualism?

100

Roger federer played this sport

What is tennis?

100

I’m light as a feather, yet the strongest man can’t hold me for much longer than a minute. What am I?

What is a breath

200

These negatively charged ions form when an atom gains electrons.

What are anions?

200

This is the type of solution with a pH less than 7.

What is acidic?

200

This process allows plants to convert sunlight into energy, forming the base of most food chains.

What is photosynthesis?

200

This sport, created in Canada, is played on ice and involves a puck.

What is ice hockey?

200

I’m always running but never get tired or hot. What am I?

What is a river

300

The two atoms found in table salt

What is Sodium Chloride

300

When an acid reacts with a base, it creates this process and typically forms water and salt.

What is neutralisation?

300

This term describes the variety of life forms in a given ecosystem, region, or on the planet.

What is biodiversity

300

This is the only sport to have been played on the moon.

What is golf?

300

I’m found in socks, scarves, and mittens; and often in the paws of playful kittens. What am I?

What is yarn/cotton

400

This ion, essential for muscle contraction, has the symbol Ca²

What is Calcium

400

0 on the pH scale would be this colour

What is red?

400

A method of sampling the density of organisms

What is a quadrat?

400

In basketball, this term describes a shot where the ball bounces off the backboard into the hoop.

What is a bank shot?

400

I go up but never come down. What am I?

What is your age?

500

This type of ion is created when water molecules split and is vital in acid-base chemistry.

What is a hydrogen ion (H⁺) or hydroxide ion (OH⁻)?

500

Purple would be this pH 

What is 14?
500
Plants get their energy from this during the night

What is cellular respiration?

500

This martial art, originating in Japan, translates to “the gentle way.”

What is judo?

500

I have branches, but no fruit, trunk, or leaves. What am I?

What is a bank?