Light
what wave has the shortest wavelength?
Gamma Rays
Who was the scientist credited with devising the first periodic table similar to the one we use today?
Dmitri Mendeleev
What are the 4 different types of plants?
Mosses, Ferns, Flowering Plants, Conifers.
What are the 3 primary colors in light?
Red, blue and green
State the 5 things that Dalton have discovered.
All matter is made from tiny particles called atoms.
The atoms in an element are identical
Atoms are indestructible
In compounds, each atoms of an element is always joined to a fixed number of atoms of another element
During chemical reactions, atoms rearrange to form new substance
What are the 4 types of asexual reproduction?
Artificial, tubers, budding and fragmentation
How fast does light travel?
light travels at approximately 300,000 km per hour/ 300,000,000 metres per hour
What did Democritus do?
The Greek thinker Democritus wrote about all matter being made up from tiny particles. He called them atomos.
What are the four main types of a flower?
petals, sepals, stamen, and carpel
In reflection of light, how are the angle of incidence and angle of reflection related?
I=R
State the meaning of a element, mixture and compound.
Element: Two or more atoms of the same components stuck to each other.
Compound: Two or more different types of atoms BONDED together
Mixture: Two or more different types of atoms mixed to each other.
Give one main difference between a unisexual and a bisexual flower.
Unisexual flowers are those which contain either male or female reproductive part and bisexual flower has both reproductive parts on the same flower.
Which one of the following statements is correct regarding rods and cones in the human eye?
(a) Cones are sensitive to dim light
(b) Cones are sensitive to bright light
(c) Rods are sensitive to bright light
(d) Rods can sense colour
B
3. The main difference between the modern periodic table and Mendeleev's periodic table is:
The main difference between Mendeleev and Modern Periodic Table is that Mendeleev’s periodic table orders the elements based on their atomic mass whereas Modern periodic table orders the elements based on their atomic number
In which part of flower does fertilisation occur?
Ovary is the part where male and female gametes fuse together.